/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 01:55:02,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 01:55:02,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 01:55:02,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-22 01:55:02,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-22 01:55:02,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-22 01:55:02,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-22 01:55:02,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-22 01:55:02,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-22 01:55:02,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-22 01:55:02,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-22 01:55:02,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-22 01:55:02,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-22 01:55:02,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-22 01:55:02,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-22 01:55:02,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-22 01:55:02,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-22 01:55:02,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-22 01:55:02,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-22 01:55:02,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-22 01:55:02,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-22 01:55:02,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-22 01:55:02,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-22 01:55:02,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-22 01:55:02,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-22 01:55:02,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-22 01:55:02,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-22 01:55:02,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-22 01:55:02,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-22 01:55:02,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-22 01:55:02,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-22 01:55:02,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-22 01:55:02,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-22 01:55:02,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-22 01:55:02,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-22 01:55:02,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-22 01:55:02,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-22 01:55:02,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-22 01:55:02,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 01:55:02,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 01:55:02,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 01:55:02,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 01:55:02,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 01:55:02,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 01:55:02,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 01:55:02,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 01:55:02,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 01:55:02,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 01:55:02,388 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 01:55:02,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 01:55:02,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 01:55:02,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 01:55:02,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:55:02,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 01:55:02,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 01:55:02,392 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 01:55:02,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 01:55:02,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 01:55:02,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 01:55:02,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 01:55:02,698 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 01:55:02,699 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 01:55:02,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_6.bpl [2021-05-22 01:55:02,700 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_6.bpl' [2021-05-22 01:55:02,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 01:55:02,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 01:55:02,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 01:55:02,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 01:55:02,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 01:55:02,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 01:55:02,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 01:55:02,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 01:55:02,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 01:55:02,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... [2021-05-22 01:55:02,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 01:55:02,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 01:55:02,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 01:55:02,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 01:55:02,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:55:02,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-05-22 01:55:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-05-22 01:55:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-05-22 01:55:02,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-05-22 01:55:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-05-22 01:55:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-05-22 01:55:02,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-05-22 01:55:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-05-22 01:55:02,843 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-05-22 01:55:02,843 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_4 given in one single declaration [2021-05-22 01:55:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure set_4 [2021-05-22 01:55:02,844 INFO L138 BoogieDeclarations]: Found implementation of procedure set_4 [2021-05-22 01:55:02,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-05-22 01:55:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-05-22 01:55:02,844 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-05-22 01:55:02,845 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 01:55:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 01:55:02,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 01:55:02,845 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_5 given in one single declaration [2021-05-22 01:55:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure set_5 [2021-05-22 01:55:02,846 INFO L138 BoogieDeclarations]: Found implementation of procedure set_5 [2021-05-22 01:55:02,847 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 01:55:02,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 01:55:02,987 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 01:55:02,988 INFO L202 PluginConnector]: Adding new model example_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:55:02 BoogieIcfgContainer [2021-05-22 01:55:02,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 01:55:02,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 01:55:02,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 01:55:02,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 01:55:02,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:55:02" (1/2) ... [2021-05-22 01:55:02,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c078fe1 and model type example_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 01:55:02, skipping insertion in model container [2021-05-22 01:55:02,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:55:02" (2/2) ... [2021-05-22 01:55:02,994 INFO L111 eAbstractionObserver]: Analyzing ICFG example_6.bpl [2021-05-22 01:55:02,999 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 01:55:02,999 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 01:55:02,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 01:55:03,000 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 01:55:03,065 INFO L149 ThreadInstanceAdder]: Constructed 36 joinOtherThreadTransitions. [2021-05-22 01:55:03,084 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:55:03,101 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:55:03,101 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:55:03,102 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:55:03,102 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:55:03,102 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:55:03,102 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:55:03,102 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:55:03,102 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:55:03,111 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 63 transitions, 264 flow [2021-05-22 01:55:03,539 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4463 states, 4461 states have (on average 4.459314055144587) internal successors, (19893), 4462 states have internal predecessors, (19893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 4463 states, 4461 states have (on average 4.459314055144587) internal successors, (19893), 4462 states have internal predecessors, (19893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:03,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:03,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:03,604 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1175608463, now seen corresponding path program 1 times [2021-05-22 01:55:03,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:03,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617386324] [2021-05-22 01:55:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:03,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:03,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617386324] [2021-05-22 01:55:03,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617386324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:03,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:03,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:55:03,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123283143] [2021-05-22 01:55:03,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:55:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:55:03,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:03,832 INFO L87 Difference]: Start difference. First operand has 4463 states, 4461 states have (on average 4.459314055144587) internal successors, (19893), 4462 states have internal predecessors, (19893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:03,936 INFO L93 Difference]: Finished difference Result 3545 states and 15330 transitions. [2021-05-22 01:55:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:55:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:03,986 INFO L225 Difference]: With dead ends: 3545 [2021-05-22 01:55:03,986 INFO L226 Difference]: Without dead ends: 3543 [2021-05-22 01:55:03,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-05-22 01:55:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3543. [2021-05-22 01:55:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 4.327498588368154) internal successors, (15328), 3542 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 15328 transitions. [2021-05-22 01:55:04,288 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 15328 transitions. Word has length 25 [2021-05-22 01:55:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:04,290 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 15328 transitions. [2021-05-22 01:55:04,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 15328 transitions. [2021-05-22 01:55:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:04,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:04,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:04,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 01:55:04,306 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1563685681, now seen corresponding path program 1 times [2021-05-22 01:55:04,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:04,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69742709] [2021-05-22 01:55:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:04,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:04,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69742709] [2021-05-22 01:55:04,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69742709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:04,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:04,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:55:04,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551813715] [2021-05-22 01:55:04,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:55:04,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:04,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:55:04,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,359 INFO L87 Difference]: Start difference. First operand 3543 states and 15328 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:04,410 INFO L93 Difference]: Finished difference Result 2709 states and 11545 transitions. [2021-05-22 01:55:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:55:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:04,435 INFO L225 Difference]: With dead ends: 2709 [2021-05-22 01:55:04,435 INFO L226 Difference]: Without dead ends: 2709 [2021-05-22 01:55:04,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2021-05-22 01:55:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 2709. [2021-05-22 01:55:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 4.263293943870015) internal successors, (11545), 2708 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 11545 transitions. [2021-05-22 01:55:04,606 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 11545 transitions. Word has length 25 [2021-05-22 01:55:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:04,606 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 11545 transitions. [2021-05-22 01:55:04,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 11545 transitions. [2021-05-22 01:55:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:04,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:04,616 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:04,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 01:55:04,617 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -817162979, now seen corresponding path program 1 times [2021-05-22 01:55:04,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:04,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230569902] [2021-05-22 01:55:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230569902] [2021-05-22 01:55:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230569902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:04,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:04,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:55:04,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370763244] [2021-05-22 01:55:04,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:55:04,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:55:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,672 INFO L87 Difference]: Start difference. First operand 2709 states and 11545 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:04,701 INFO L93 Difference]: Finished difference Result 2106 states and 8830 transitions. [2021-05-22 01:55:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:55:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:04,715 INFO L225 Difference]: With dead ends: 2106 [2021-05-22 01:55:04,716 INFO L226 Difference]: Without dead ends: 2106 [2021-05-22 01:55:04,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-05-22 01:55:04,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2021-05-22 01:55:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 4.194774346793349) internal successors, (8830), 2105 states have internal predecessors, (8830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 8830 transitions. [2021-05-22 01:55:04,797 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 8830 transitions. Word has length 25 [2021-05-22 01:55:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:04,797 INFO L482 AbstractCegarLoop]: Abstraction has 2106 states and 8830 transitions. [2021-05-22 01:55:04,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 8830 transitions. [2021-05-22 01:55:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:04,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:04,804 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:04,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 01:55:04,804 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash -407784791, now seen corresponding path program 1 times [2021-05-22 01:55:04,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:04,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906332065] [2021-05-22 01:55:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:04,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:04,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906332065] [2021-05-22 01:55:04,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906332065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:04,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:04,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:55:04,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101529878] [2021-05-22 01:55:04,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:55:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:55:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,857 INFO L87 Difference]: Start difference. First operand 2106 states and 8830 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:04,911 INFO L93 Difference]: Finished difference Result 1863 states and 7615 transitions. [2021-05-22 01:55:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:55:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:04,924 INFO L225 Difference]: With dead ends: 1863 [2021-05-22 01:55:04,924 INFO L226 Difference]: Without dead ends: 1863 [2021-05-22 01:55:04,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-05-22 01:55:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1863. [2021-05-22 01:55:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 4.08968850698174) internal successors, (7615), 1862 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 7615 transitions. [2021-05-22 01:55:05,001 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 7615 transitions. Word has length 25 [2021-05-22 01:55:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:05,002 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 7615 transitions. [2021-05-22 01:55:05,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 7615 transitions. [2021-05-22 01:55:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:05,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:05,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:05,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 01:55:05,009 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash 447521863, now seen corresponding path program 1 times [2021-05-22 01:55:05,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:05,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783377650] [2021-05-22 01:55:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:05,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:05,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783377650] [2021-05-22 01:55:05,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783377650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:05,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:05,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:55:05,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789057686] [2021-05-22 01:55:05,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:55:05,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:05,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:55:05,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:05,056 INFO L87 Difference]: Start difference. First operand 1863 states and 7615 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:05,085 INFO L93 Difference]: Finished difference Result 1458 states and 5833 transitions. [2021-05-22 01:55:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:55:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:05,098 INFO L225 Difference]: With dead ends: 1458 [2021-05-22 01:55:05,098 INFO L226 Difference]: Without dead ends: 1458 [2021-05-22 01:55:05,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:55:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-05-22 01:55:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2021-05-22 01:55:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 4.003431708991077) internal successors, (5833), 1457 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5833 transitions. [2021-05-22 01:55:05,152 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5833 transitions. Word has length 25 [2021-05-22 01:55:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:05,152 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5833 transitions. [2021-05-22 01:55:05,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5833 transitions. [2021-05-22 01:55:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:05,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:05,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:05,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 01:55:05,157 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:05,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1957625315, now seen corresponding path program 1 times [2021-05-22 01:55:05,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:05,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833001561] [2021-05-22 01:55:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:05,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:05,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833001561] [2021-05-22 01:55:05,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833001561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:05,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:05,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507201489] [2021-05-22 01:55:05,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:05,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:05,467 INFO L87 Difference]: Start difference. First operand 1458 states and 5833 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:05,601 INFO L93 Difference]: Finished difference Result 3167 states and 11759 transitions. [2021-05-22 01:55:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:05,618 INFO L225 Difference]: With dead ends: 3167 [2021-05-22 01:55:05,619 INFO L226 Difference]: Without dead ends: 3008 [2021-05-22 01:55:05,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-22 01:55:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 1530. [2021-05-22 01:55:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.998037933289732) internal successors, (6113), 1529 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 6113 transitions. [2021-05-22 01:55:05,709 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 6113 transitions. Word has length 25 [2021-05-22 01:55:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:05,710 INFO L482 AbstractCegarLoop]: Abstraction has 1530 states and 6113 transitions. [2021-05-22 01:55:05,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 6113 transitions. [2021-05-22 01:55:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:05,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:05,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:05,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 01:55:05,719 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1329043997, now seen corresponding path program 2 times [2021-05-22 01:55:05,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:05,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025038519] [2021-05-22 01:55:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:05,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:05,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025038519] [2021-05-22 01:55:05,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025038519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:05,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:05,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:05,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787074936] [2021-05-22 01:55:05,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:05,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:05,956 INFO L87 Difference]: Start difference. First operand 1530 states and 6113 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:06,065 INFO L93 Difference]: Finished difference Result 3230 states and 11966 transitions. [2021-05-22 01:55:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:06,076 INFO L225 Difference]: With dead ends: 3230 [2021-05-22 01:55:06,076 INFO L226 Difference]: Without dead ends: 2976 [2021-05-22 01:55:06,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-05-22 01:55:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 1498. [2021-05-22 01:55:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.997995991983968) internal successors, (5985), 1497 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5985 transitions. [2021-05-22 01:55:06,144 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5985 transitions. Word has length 25 [2021-05-22 01:55:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:06,144 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5985 transitions. [2021-05-22 01:55:06,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5985 transitions. [2021-05-22 01:55:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:06,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:06,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:06,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 01:55:06,149 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1919010631, now seen corresponding path program 3 times [2021-05-22 01:55:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:06,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224631189] [2021-05-22 01:55:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224631189] [2021-05-22 01:55:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224631189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:06,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:06,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704565731] [2021-05-22 01:55:06,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:06,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:06,295 INFO L87 Difference]: Start difference. First operand 1498 states and 5985 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:06,366 INFO L93 Difference]: Finished difference Result 3118 states and 11565 transitions. [2021-05-22 01:55:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:06,378 INFO L225 Difference]: With dead ends: 3118 [2021-05-22 01:55:06,378 INFO L226 Difference]: Without dead ends: 2959 [2021-05-22 01:55:06,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-05-22 01:55:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1514. [2021-05-22 01:55:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.9874421678783873) internal successors, (6033), 1513 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 6033 transitions. [2021-05-22 01:55:06,450 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 6033 transitions. Word has length 25 [2021-05-22 01:55:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:06,450 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 6033 transitions. [2021-05-22 01:55:06,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 6033 transitions. [2021-05-22 01:55:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:06,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:06,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:06,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 01:55:06,454 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash 786021915, now seen corresponding path program 4 times [2021-05-22 01:55:06,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:06,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179484519] [2021-05-22 01:55:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:06,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179484519] [2021-05-22 01:55:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179484519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:06,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:06,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782773021] [2021-05-22 01:55:06,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:06,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:06,636 INFO L87 Difference]: Start difference. First operand 1514 states and 6033 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:06,718 INFO L93 Difference]: Finished difference Result 3148 states and 11658 transitions. [2021-05-22 01:55:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:06,729 INFO L225 Difference]: With dead ends: 3148 [2021-05-22 01:55:06,729 INFO L226 Difference]: Without dead ends: 2943 [2021-05-22 01:55:06,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2021-05-22 01:55:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 1498. [2021-05-22 01:55:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.9926519706078825) internal successors, (5977), 1497 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5977 transitions. [2021-05-22 01:55:06,809 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5977 transitions. Word has length 25 [2021-05-22 01:55:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:06,809 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5977 transitions. [2021-05-22 01:55:06,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:06,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5977 transitions. [2021-05-22 01:55:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:06,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:06,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:06,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 01:55:06,814 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash 147858429, now seen corresponding path program 5 times [2021-05-22 01:55:06,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:06,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235766213] [2021-05-22 01:55:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:07,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:07,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235766213] [2021-05-22 01:55:07,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235766213] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:07,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:07,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:07,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165890319] [2021-05-22 01:55:07,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:07,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:07,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:07,077 INFO L87 Difference]: Start difference. First operand 1498 states and 5977 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:07,171 INFO L93 Difference]: Finished difference Result 3258 states and 12063 transitions. [2021-05-22 01:55:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:07,184 INFO L225 Difference]: With dead ends: 3258 [2021-05-22 01:55:07,184 INFO L226 Difference]: Without dead ends: 3069 [2021-05-22 01:55:07,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-05-22 01:55:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1561. [2021-05-22 01:55:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.9641025641025642) internal successors, (6184), 1560 states have internal predecessors, (6184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 6184 transitions. [2021-05-22 01:55:07,261 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 6184 transitions. Word has length 25 [2021-05-22 01:55:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:07,263 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 6184 transitions. [2021-05-22 01:55:07,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 6184 transitions. [2021-05-22 01:55:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:07,267 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:07,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:07,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 01:55:07,268 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 445911387, now seen corresponding path program 6 times [2021-05-22 01:55:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:07,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794522203] [2021-05-22 01:55:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:07,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:07,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794522203] [2021-05-22 01:55:07,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794522203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:07,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:07,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:07,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618560321] [2021-05-22 01:55:07,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:07,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:07,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:07,451 INFO L87 Difference]: Start difference. First operand 1561 states and 6184 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:07,532 INFO L93 Difference]: Finished difference Result 3291 states and 12146 transitions. [2021-05-22 01:55:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:07,543 INFO L225 Difference]: With dead ends: 3291 [2021-05-22 01:55:07,544 INFO L226 Difference]: Without dead ends: 2982 [2021-05-22 01:55:07,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-05-22 01:55:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1474. [2021-05-22 01:55:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.9979633401221997) internal successors, (5889), 1473 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5889 transitions. [2021-05-22 01:55:07,618 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5889 transitions. Word has length 25 [2021-05-22 01:55:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:07,618 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5889 transitions. [2021-05-22 01:55:07,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5889 transitions. [2021-05-22 01:55:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:07,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:07,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:07,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 01:55:07,623 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1934855229, now seen corresponding path program 7 times [2021-05-22 01:55:07,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:07,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543173218] [2021-05-22 01:55:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:07,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543173218] [2021-05-22 01:55:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543173218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:07,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:07,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:07,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683551716] [2021-05-22 01:55:07,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:07,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:07,797 INFO L87 Difference]: Start difference. First operand 1474 states and 5889 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:07,866 INFO L93 Difference]: Finished difference Result 3140 states and 11663 transitions. [2021-05-22 01:55:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:07,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:07,876 INFO L225 Difference]: With dead ends: 3140 [2021-05-22 01:55:07,876 INFO L226 Difference]: Without dead ends: 2981 [2021-05-22 01:55:07,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-05-22 01:55:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 1522. [2021-05-22 01:55:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.992767915844839) internal successors, (6073), 1521 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6073 transitions. [2021-05-22 01:55:07,940 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6073 transitions. Word has length 25 [2021-05-22 01:55:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:07,940 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6073 transitions. [2021-05-22 01:55:07,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6073 transitions. [2021-05-22 01:55:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:07,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:07,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:07,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 01:55:07,944 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash 926557245, now seen corresponding path program 8 times [2021-05-22 01:55:07,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:07,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717508385] [2021-05-22 01:55:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:08,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:08,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717508385] [2021-05-22 01:55:08,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717508385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:08,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:08,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228341988] [2021-05-22 01:55:08,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:08,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:08,078 INFO L87 Difference]: Start difference. First operand 1522 states and 6073 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:08,150 INFO L93 Difference]: Finished difference Result 3203 states and 11870 transitions. [2021-05-22 01:55:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:08,159 INFO L225 Difference]: With dead ends: 3203 [2021-05-22 01:55:08,159 INFO L226 Difference]: Without dead ends: 2949 [2021-05-22 01:55:08,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-05-22 01:55:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 1490. [2021-05-22 01:55:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.992612491605104) internal successors, (5945), 1489 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5945 transitions. [2021-05-22 01:55:08,223 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5945 transitions. Word has length 25 [2021-05-22 01:55:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:08,224 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5945 transitions. [2021-05-22 01:55:08,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5945 transitions. [2021-05-22 01:55:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:08,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:08,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:08,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 01:55:08,228 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:08,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1371078561, now seen corresponding path program 9 times [2021-05-22 01:55:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:08,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345612212] [2021-05-22 01:55:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:08,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345612212] [2021-05-22 01:55:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345612212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:08,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:08,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:08,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555633247] [2021-05-22 01:55:08,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:08,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:08,397 INFO L87 Difference]: Start difference. First operand 1490 states and 5945 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:08,463 INFO L93 Difference]: Finished difference Result 3089 states and 11464 transitions. [2021-05-22 01:55:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:08,472 INFO L225 Difference]: With dead ends: 3089 [2021-05-22 01:55:08,472 INFO L226 Difference]: Without dead ends: 2930 [2021-05-22 01:55:08,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-05-22 01:55:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1506. [2021-05-22 01:55:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.9820598006644516) internal successors, (5993), 1505 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5993 transitions. [2021-05-22 01:55:08,533 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5993 transitions. Word has length 25 [2021-05-22 01:55:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:08,533 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5993 transitions. [2021-05-22 01:55:08,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5993 transitions. [2021-05-22 01:55:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:08,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:08,537 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:08,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 01:55:08,538 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash -362780577, now seen corresponding path program 10 times [2021-05-22 01:55:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:08,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284560628] [2021-05-22 01:55:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:08,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:08,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284560628] [2021-05-22 01:55:08,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284560628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:08,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:08,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639503541] [2021-05-22 01:55:08,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:08,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:08,676 INFO L87 Difference]: Start difference. First operand 1506 states and 5993 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:08,765 INFO L93 Difference]: Finished difference Result 3117 states and 11552 transitions. [2021-05-22 01:55:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:08,774 INFO L225 Difference]: With dead ends: 3117 [2021-05-22 01:55:08,774 INFO L226 Difference]: Without dead ends: 2914 [2021-05-22 01:55:08,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-05-22 01:55:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 1490. [2021-05-22 01:55:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.987239758226998) internal successors, (5937), 1489 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5937 transitions. [2021-05-22 01:55:08,833 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5937 transitions. Word has length 25 [2021-05-22 01:55:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:08,833 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5937 transitions. [2021-05-22 01:55:08,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5937 transitions. [2021-05-22 01:55:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:08,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:08,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:08,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 01:55:08,837 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1325465695, now seen corresponding path program 11 times [2021-05-22 01:55:08,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:08,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009463237] [2021-05-22 01:55:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:08,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009463237] [2021-05-22 01:55:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009463237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:08,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:08,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16498441] [2021-05-22 01:55:08,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:08,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:08,970 INFO L87 Difference]: Start difference. First operand 1490 states and 5937 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:09,053 INFO L93 Difference]: Finished difference Result 3210 states and 11906 transitions. [2021-05-22 01:55:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:09,061 INFO L225 Difference]: With dead ends: 3210 [2021-05-22 01:55:09,061 INFO L226 Difference]: Without dead ends: 3023 [2021-05-22 01:55:09,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2021-05-22 01:55:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 1536. [2021-05-22 01:55:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.9700325732899024) internal successors, (6094), 1535 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 6094 transitions. [2021-05-22 01:55:09,112 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 6094 transitions. Word has length 25 [2021-05-22 01:55:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:09,112 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 6094 transitions. [2021-05-22 01:55:09,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 6094 transitions. [2021-05-22 01:55:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:09,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:09,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 01:55:09,116 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash 972326205, now seen corresponding path program 12 times [2021-05-22 01:55:09,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:09,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854447102] [2021-05-22 01:55:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:09,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854447102] [2021-05-22 01:55:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854447102] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:09,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:09,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:09,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127715787] [2021-05-22 01:55:09,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:09,252 INFO L87 Difference]: Start difference. First operand 1536 states and 6094 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:09,320 INFO L93 Difference]: Finished difference Result 3245 states and 11995 transitions. [2021-05-22 01:55:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:09,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:09,328 INFO L225 Difference]: With dead ends: 3245 [2021-05-22 01:55:09,329 INFO L226 Difference]: Without dead ends: 2961 [2021-05-22 01:55:09,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-05-22 01:55:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1474. [2021-05-22 01:55:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.992532247114732) internal successors, (5881), 1473 states have internal predecessors, (5881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5881 transitions. [2021-05-22 01:55:09,392 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5881 transitions. Word has length 25 [2021-05-22 01:55:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:09,392 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5881 transitions. [2021-05-22 01:55:09,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5881 transitions. [2021-05-22 01:55:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:09,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:09,397 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:09,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 01:55:09,397 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 296831769, now seen corresponding path program 13 times [2021-05-22 01:55:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416078489] [2021-05-22 01:55:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:09,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416078489] [2021-05-22 01:55:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416078489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:09,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:09,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:09,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658527831] [2021-05-22 01:55:09,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:09,531 INFO L87 Difference]: Start difference. First operand 1474 states and 5881 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:09,618 INFO L93 Difference]: Finished difference Result 3018 states and 11199 transitions. [2021-05-22 01:55:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:09,626 INFO L225 Difference]: With dead ends: 3018 [2021-05-22 01:55:09,626 INFO L226 Difference]: Without dead ends: 2859 [2021-05-22 01:55:09,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2021-05-22 01:55:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 1498. [2021-05-22 01:55:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.984635938543754) internal successors, (5965), 1497 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5965 transitions. [2021-05-22 01:55:09,682 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5965 transitions. Word has length 25 [2021-05-22 01:55:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:09,682 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5965 transitions. [2021-05-22 01:55:09,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5965 transitions. [2021-05-22 01:55:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:09,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:09,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:09,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 01:55:09,686 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1293102981, now seen corresponding path program 14 times [2021-05-22 01:55:09,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:09,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744040351] [2021-05-22 01:55:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:09,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744040351] [2021-05-22 01:55:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744040351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:09,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:09,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:09,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037370813] [2021-05-22 01:55:09,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:09,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:09,832 INFO L87 Difference]: Start difference. First operand 1498 states and 5965 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:09,911 INFO L93 Difference]: Finished difference Result 3048 states and 11292 transitions. [2021-05-22 01:55:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:09,917 INFO L225 Difference]: With dead ends: 3048 [2021-05-22 01:55:09,917 INFO L226 Difference]: Without dead ends: 2843 [2021-05-22 01:55:09,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2021-05-22 01:55:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 1482. [2021-05-22 01:55:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.9898717083051993) internal successors, (5909), 1481 states have internal predecessors, (5909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5909 transitions. [2021-05-22 01:55:09,966 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5909 transitions. Word has length 25 [2021-05-22 01:55:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:09,966 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5909 transitions. [2021-05-22 01:55:09,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5909 transitions. [2021-05-22 01:55:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:09,970 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:09,970 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:09,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 01:55:09,970 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:09,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1377894395, now seen corresponding path program 15 times [2021-05-22 01:55:09,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:09,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228803649] [2021-05-22 01:55:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:10,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228803649] [2021-05-22 01:55:10,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228803649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:10,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:10,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:10,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839624265] [2021-05-22 01:55:10,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:10,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:10,107 INFO L87 Difference]: Start difference. First operand 1482 states and 5909 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:10,200 INFO L93 Difference]: Finished difference Result 3016 states and 11186 transitions. [2021-05-22 01:55:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:10,207 INFO L225 Difference]: With dead ends: 3016 [2021-05-22 01:55:10,207 INFO L226 Difference]: Without dead ends: 2857 [2021-05-22 01:55:10,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-05-22 01:55:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 1498. [2021-05-22 01:55:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.979291917167669) internal successors, (5957), 1497 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5957 transitions. [2021-05-22 01:55:10,264 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5957 transitions. Word has length 25 [2021-05-22 01:55:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:10,264 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5957 transitions. [2021-05-22 01:55:10,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5957 transitions. [2021-05-22 01:55:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:10,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:10,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:10,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 01:55:10,268 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1908774917, now seen corresponding path program 16 times [2021-05-22 01:55:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:10,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240222954] [2021-05-22 01:55:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:10,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:10,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240222954] [2021-05-22 01:55:10,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240222954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:10,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:10,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:10,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725392439] [2021-05-22 01:55:10,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:10,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:10,427 INFO L87 Difference]: Start difference. First operand 1498 states and 5957 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:10,518 INFO L93 Difference]: Finished difference Result 3044 states and 11274 transitions. [2021-05-22 01:55:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:10,525 INFO L225 Difference]: With dead ends: 3044 [2021-05-22 01:55:10,526 INFO L226 Difference]: Without dead ends: 2841 [2021-05-22 01:55:10,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-05-22 01:55:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1482. [2021-05-22 01:55:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.9844699527346386) internal successors, (5901), 1481 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5901 transitions. [2021-05-22 01:55:10,576 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5901 transitions. Word has length 25 [2021-05-22 01:55:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:10,576 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5901 transitions. [2021-05-22 01:55:10,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5901 transitions. [2021-05-22 01:55:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:10,580 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:10,580 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:10,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 01:55:10,580 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1499910947, now seen corresponding path program 17 times [2021-05-22 01:55:10,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:10,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404110542] [2021-05-22 01:55:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:10,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:10,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404110542] [2021-05-22 01:55:10,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404110542] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:10,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:10,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:10,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921932797] [2021-05-22 01:55:10,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:10,702 INFO L87 Difference]: Start difference. First operand 1482 states and 5901 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:10,788 INFO L93 Difference]: Finished difference Result 3090 states and 11455 transitions. [2021-05-22 01:55:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:10,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:10,795 INFO L225 Difference]: With dead ends: 3090 [2021-05-22 01:55:10,795 INFO L226 Difference]: Without dead ends: 2901 [2021-05-22 01:55:10,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-05-22 01:55:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1512. [2021-05-22 01:55:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.966909331568498) internal successors, (5994), 1511 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5994 transitions. [2021-05-22 01:55:10,860 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5994 transitions. Word has length 25 [2021-05-22 01:55:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:10,860 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5994 transitions. [2021-05-22 01:55:10,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5994 transitions. [2021-05-22 01:55:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:10,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:10,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:10,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 01:55:10,864 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash 751719355, now seen corresponding path program 18 times [2021-05-22 01:55:10,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:10,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705428179] [2021-05-22 01:55:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:10,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:10,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705428179] [2021-05-22 01:55:10,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705428179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:10,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:10,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:10,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879825659] [2021-05-22 01:55:10,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:10,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:10,989 INFO L87 Difference]: Start difference. First operand 1512 states and 5994 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:11,073 INFO L93 Difference]: Finished difference Result 3088 states and 11420 transitions. [2021-05-22 01:55:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:11,080 INFO L225 Difference]: With dead ends: 3088 [2021-05-22 01:55:11,080 INFO L226 Difference]: Without dead ends: 2863 [2021-05-22 01:55:11,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-05-22 01:55:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 1474. [2021-05-22 01:55:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.989816700610998) internal successors, (5877), 1473 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5877 transitions. [2021-05-22 01:55:11,134 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5877 transitions. Word has length 25 [2021-05-22 01:55:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:11,134 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5877 transitions. [2021-05-22 01:55:11,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5877 transitions. [2021-05-22 01:55:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:11,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:11,138 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:11,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 01:55:11,139 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash -594697665, now seen corresponding path program 19 times [2021-05-22 01:55:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:11,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247232168] [2021-05-22 01:55:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:11,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:11,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247232168] [2021-05-22 01:55:11,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247232168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:11,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:11,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:11,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988704457] [2021-05-22 01:55:11,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:11,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:11,253 INFO L87 Difference]: Start difference. First operand 1474 states and 5877 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:11,346 INFO L93 Difference]: Finished difference Result 3261 states and 12104 transitions. [2021-05-22 01:55:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:11,352 INFO L225 Difference]: With dead ends: 3261 [2021-05-22 01:55:11,352 INFO L226 Difference]: Without dead ends: 3072 [2021-05-22 01:55:11,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-05-22 01:55:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1543. [2021-05-22 01:55:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.970817120622568) internal successors, (6123), 1542 states have internal predecessors, (6123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 6123 transitions. [2021-05-22 01:55:11,403 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 6123 transitions. Word has length 25 [2021-05-22 01:55:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:11,404 INFO L482 AbstractCegarLoop]: Abstraction has 1543 states and 6123 transitions. [2021-05-22 01:55:11,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 6123 transitions. [2021-05-22 01:55:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:11,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:11,407 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:11,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 01:55:11,408 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1656932637, now seen corresponding path program 20 times [2021-05-22 01:55:11,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:11,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046858113] [2021-05-22 01:55:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:11,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:11,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046858113] [2021-05-22 01:55:11,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046858113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:11,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:11,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:11,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304253202] [2021-05-22 01:55:11,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:11,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:11,520 INFO L87 Difference]: Start difference. First operand 1543 states and 6123 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:11,603 INFO L93 Difference]: Finished difference Result 3259 states and 12069 transitions. [2021-05-22 01:55:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:11,610 INFO L225 Difference]: With dead ends: 3259 [2021-05-22 01:55:11,611 INFO L226 Difference]: Without dead ends: 3042 [2021-05-22 01:55:11,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-05-22 01:55:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1513. [2021-05-22 01:55:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.9781746031746033) internal successors, (6015), 1512 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 6015 transitions. [2021-05-22 01:55:11,665 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 6015 transitions. Word has length 25 [2021-05-22 01:55:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:11,665 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 6015 transitions. [2021-05-22 01:55:11,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 6015 transitions. [2021-05-22 01:55:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:11,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:11,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:11,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 01:55:11,669 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash -659331171, now seen corresponding path program 21 times [2021-05-22 01:55:11,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:11,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065681099] [2021-05-22 01:55:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:11,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065681099] [2021-05-22 01:55:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065681099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:11,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:11,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:11,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058469732] [2021-05-22 01:55:11,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:11,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:11,788 INFO L87 Difference]: Start difference. First operand 1513 states and 6015 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:11,861 INFO L93 Difference]: Finished difference Result 3329 states and 12323 transitions. [2021-05-22 01:55:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:11,869 INFO L225 Difference]: With dead ends: 3329 [2021-05-22 01:55:11,870 INFO L226 Difference]: Without dead ends: 3140 [2021-05-22 01:55:11,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-05-22 01:55:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 1576. [2021-05-22 01:55:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.9504761904761905) internal successors, (6222), 1575 states have internal predecessors, (6222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 6222 transitions. [2021-05-22 01:55:11,916 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 6222 transitions. Word has length 25 [2021-05-22 01:55:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:11,917 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 6222 transitions. [2021-05-22 01:55:11,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 6222 transitions. [2021-05-22 01:55:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:11,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:11,920 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:11,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 01:55:11,921 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1215119459, now seen corresponding path program 22 times [2021-05-22 01:55:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:11,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745013687] [2021-05-22 01:55:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:12,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:12,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745013687] [2021-05-22 01:55:12,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745013687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:12,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:12,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688331365] [2021-05-22 01:55:12,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:12,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:12,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:12,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:12,064 INFO L87 Difference]: Start difference. First operand 1576 states and 6222 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:12,140 INFO L93 Difference]: Finished difference Result 3362 states and 12406 transitions. [2021-05-22 01:55:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:12,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:12,148 INFO L225 Difference]: With dead ends: 3362 [2021-05-22 01:55:12,148 INFO L226 Difference]: Without dead ends: 3077 [2021-05-22 01:55:12,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-05-22 01:55:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 1513. [2021-05-22 01:55:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.9576719576719577) internal successors, (5984), 1512 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5984 transitions. [2021-05-22 01:55:12,212 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5984 transitions. Word has length 25 [2021-05-22 01:55:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:12,212 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5984 transitions. [2021-05-22 01:55:12,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5984 transitions. [2021-05-22 01:55:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:12,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:12,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:12,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 01:55:12,216 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 323016443, now seen corresponding path program 23 times [2021-05-22 01:55:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:12,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125285357] [2021-05-22 01:55:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:12,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:12,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125285357] [2021-05-22 01:55:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125285357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:12,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:12,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:12,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375784615] [2021-05-22 01:55:12,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:12,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:12,342 INFO L87 Difference]: Start difference. First operand 1513 states and 5984 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:12,428 INFO L93 Difference]: Finished difference Result 3308 states and 12231 transitions. [2021-05-22 01:55:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:12,436 INFO L225 Difference]: With dead ends: 3308 [2021-05-22 01:55:12,436 INFO L226 Difference]: Without dead ends: 3121 [2021-05-22 01:55:12,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-05-22 01:55:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 1559. [2021-05-22 01:55:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.941591784338896) internal successors, (6141), 1558 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 6141 transitions. [2021-05-22 01:55:12,502 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 6141 transitions. Word has length 25 [2021-05-22 01:55:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:12,502 INFO L482 AbstractCegarLoop]: Abstraction has 1559 states and 6141 transitions. [2021-05-22 01:55:12,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 6141 transitions. [2021-05-22 01:55:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:12,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:12,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:12,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 01:55:12,506 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2034373155, now seen corresponding path program 24 times [2021-05-22 01:55:12,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:12,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807403544] [2021-05-22 01:55:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:12,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807403544] [2021-05-22 01:55:12,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807403544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:12,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:12,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048286221] [2021-05-22 01:55:12,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:12,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:12,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:12,631 INFO L87 Difference]: Start difference. First operand 1559 states and 6141 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:12,694 INFO L93 Difference]: Finished difference Result 3343 states and 12320 transitions. [2021-05-22 01:55:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:12,701 INFO L225 Difference]: With dead ends: 3343 [2021-05-22 01:55:12,701 INFO L226 Difference]: Without dead ends: 3020 [2021-05-22 01:55:12,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-05-22 01:55:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 1458. [2021-05-22 01:55:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.9979409746053536) internal successors, (5825), 1457 states have internal predecessors, (5825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5825 transitions. [2021-05-22 01:55:12,765 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5825 transitions. Word has length 25 [2021-05-22 01:55:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:12,765 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5825 transitions. [2021-05-22 01:55:12,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5825 transitions. [2021-05-22 01:55:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:12,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:12,769 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:12,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 01:55:12,769 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash -891763715, now seen corresponding path program 25 times [2021-05-22 01:55:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:12,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044460670] [2021-05-22 01:55:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:12,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:12,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044460670] [2021-05-22 01:55:12,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044460670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:12,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:12,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:12,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590830264] [2021-05-22 01:55:12,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:12,890 INFO L87 Difference]: Start difference. First operand 1458 states and 5825 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:12,960 INFO L93 Difference]: Finished difference Result 3146 states and 11689 transitions. [2021-05-22 01:55:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:12,967 INFO L225 Difference]: With dead ends: 3146 [2021-05-22 01:55:12,968 INFO L226 Difference]: Without dead ends: 2987 [2021-05-22 01:55:12,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2021-05-22 01:55:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 1526. [2021-05-22 01:55:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 3.9954098360655736) internal successors, (6093), 1525 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6093 transitions. [2021-05-22 01:55:13,028 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6093 transitions. Word has length 25 [2021-05-22 01:55:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:13,029 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6093 transitions. [2021-05-22 01:55:13,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6093 transitions. [2021-05-22 01:55:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:13,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:13,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:13,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 01:55:13,033 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1900061699, now seen corresponding path program 26 times [2021-05-22 01:55:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:13,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147574182] [2021-05-22 01:55:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:13,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:13,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147574182] [2021-05-22 01:55:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147574182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:13,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:13,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:13,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43532188] [2021-05-22 01:55:13,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:13,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:13,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:13,178 INFO L87 Difference]: Start difference. First operand 1526 states and 6093 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:13,242 INFO L93 Difference]: Finished difference Result 3209 states and 11896 transitions. [2021-05-22 01:55:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:13,248 INFO L225 Difference]: With dead ends: 3209 [2021-05-22 01:55:13,248 INFO L226 Difference]: Without dead ends: 2955 [2021-05-22 01:55:13,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-05-22 01:55:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 1494. [2021-05-22 01:55:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.9953114534494305) internal successors, (5965), 1493 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5965 transitions. [2021-05-22 01:55:13,305 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5965 transitions. Word has length 25 [2021-05-22 01:55:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:13,305 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5965 transitions. [2021-05-22 01:55:13,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5965 transitions. [2021-05-22 01:55:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:13,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:13,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:13,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 01:55:13,309 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash -853149031, now seen corresponding path program 27 times [2021-05-22 01:55:13,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:13,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261962174] [2021-05-22 01:55:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:13,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:13,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261962174] [2021-05-22 01:55:13,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261962174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:13,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:13,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:13,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852903016] [2021-05-22 01:55:13,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:13,424 INFO L87 Difference]: Start difference. First operand 1494 states and 5965 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:13,495 INFO L93 Difference]: Finished difference Result 3097 states and 11495 transitions. [2021-05-22 01:55:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:13,503 INFO L225 Difference]: With dead ends: 3097 [2021-05-22 01:55:13,503 INFO L226 Difference]: Without dead ends: 2938 [2021-05-22 01:55:13,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-05-22 01:55:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1510. [2021-05-22 01:55:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.984758117958913) internal successors, (6013), 1509 states have internal predecessors, (6013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 6013 transitions. [2021-05-22 01:55:13,558 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 6013 transitions. Word has length 25 [2021-05-22 01:55:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:13,559 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 6013 transitions. [2021-05-22 01:55:13,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 6013 transitions. [2021-05-22 01:55:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:13,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:13,562 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:13,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 01:55:13,563 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1851883515, now seen corresponding path program 28 times [2021-05-22 01:55:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:13,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361955549] [2021-05-22 01:55:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:13,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:13,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361955549] [2021-05-22 01:55:13,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361955549] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:13,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:13,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542011082] [2021-05-22 01:55:13,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:13,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:13,694 INFO L87 Difference]: Start difference. First operand 1510 states and 6013 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:13,780 INFO L93 Difference]: Finished difference Result 3127 states and 11588 transitions. [2021-05-22 01:55:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:13,787 INFO L225 Difference]: With dead ends: 3127 [2021-05-22 01:55:13,788 INFO L226 Difference]: Without dead ends: 2922 [2021-05-22 01:55:13,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2021-05-22 01:55:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 1494. [2021-05-22 01:55:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.989953114534494) internal successors, (5957), 1493 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5957 transitions. [2021-05-22 01:55:13,844 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5957 transitions. Word has length 25 [2021-05-22 01:55:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:13,844 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5957 transitions. [2021-05-22 01:55:13,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5957 transitions. [2021-05-22 01:55:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:13,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:13,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:13,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 01:55:13,848 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1213720029, now seen corresponding path program 29 times [2021-05-22 01:55:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:13,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862801909] [2021-05-22 01:55:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:13,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:13,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862801909] [2021-05-22 01:55:13,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862801909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:13,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:13,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:13,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706040627] [2021-05-22 01:55:13,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:13,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:13,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:13,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:13,948 INFO L87 Difference]: Start difference. First operand 1494 states and 5957 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:14,020 INFO L93 Difference]: Finished difference Result 3237 states and 11993 transitions. [2021-05-22 01:55:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:14,026 INFO L225 Difference]: With dead ends: 3237 [2021-05-22 01:55:14,027 INFO L226 Difference]: Without dead ends: 3048 [2021-05-22 01:55:14,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-05-22 01:55:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 1557. [2021-05-22 01:55:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.961439588688946) internal successors, (6164), 1556 states have internal predecessors, (6164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 6164 transitions. [2021-05-22 01:55:14,067 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 6164 transitions. Word has length 25 [2021-05-22 01:55:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:14,067 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 6164 transitions. [2021-05-22 01:55:14,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 6164 transitions. [2021-05-22 01:55:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:14,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:14,070 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:14,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 01:55:14,070 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1511772987, now seen corresponding path program 30 times [2021-05-22 01:55:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:14,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118475141] [2021-05-22 01:55:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:14,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:14,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118475141] [2021-05-22 01:55:14,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118475141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:14,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:14,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:14,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215745211] [2021-05-22 01:55:14,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:14,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:14,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:14,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:14,179 INFO L87 Difference]: Start difference. First operand 1557 states and 6164 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:14,252 INFO L93 Difference]: Finished difference Result 3270 states and 12076 transitions. [2021-05-22 01:55:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:14,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:14,260 INFO L225 Difference]: With dead ends: 3270 [2021-05-22 01:55:14,260 INFO L226 Difference]: Without dead ends: 2961 [2021-05-22 01:55:14,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-05-22 01:55:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1470. [2021-05-22 01:55:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.995234853641933) internal successors, (5869), 1469 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5869 transitions. [2021-05-22 01:55:14,314 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5869 transitions. Word has length 25 [2021-05-22 01:55:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:14,314 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5869 transitions. [2021-05-22 01:55:14,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5869 transitions. [2021-05-22 01:55:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:14,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:14,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:14,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 01:55:14,318 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:14,318 INFO L82 PathProgramCache]: Analyzing trace with hash 407415963, now seen corresponding path program 31 times [2021-05-22 01:55:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:14,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909235431] [2021-05-22 01:55:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:14,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909235431] [2021-05-22 01:55:14,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909235431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:14,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:14,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:14,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445779179] [2021-05-22 01:55:14,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:14,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:14,439 INFO L87 Difference]: Start difference. First operand 1470 states and 5869 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:14,500 INFO L93 Difference]: Finished difference Result 3113 states and 11574 transitions. [2021-05-22 01:55:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:14,512 INFO L225 Difference]: With dead ends: 3113 [2021-05-22 01:55:14,512 INFO L226 Difference]: Without dead ends: 2954 [2021-05-22 01:55:14,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:14,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-05-22 01:55:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 1518. [2021-05-22 01:55:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.990112063282795) internal successors, (6053), 1517 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 6053 transitions. [2021-05-22 01:55:14,555 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 6053 transitions. Word has length 25 [2021-05-22 01:55:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:14,555 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 6053 transitions. [2021-05-22 01:55:14,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 6053 transitions. [2021-05-22 01:55:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:14,558 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:14,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:14,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 01:55:14,558 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash -600882021, now seen corresponding path program 32 times [2021-05-22 01:55:14,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:14,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268211191] [2021-05-22 01:55:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:14,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:14,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268211191] [2021-05-22 01:55:14,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268211191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:14,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:14,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453088127] [2021-05-22 01:55:14,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:14,686 INFO L87 Difference]: Start difference. First operand 1518 states and 6053 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:14,758 INFO L93 Difference]: Finished difference Result 3176 states and 11781 transitions. [2021-05-22 01:55:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:14,766 INFO L225 Difference]: With dead ends: 3176 [2021-05-22 01:55:14,766 INFO L226 Difference]: Without dead ends: 2922 [2021-05-22 01:55:14,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2021-05-22 01:55:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 1486. [2021-05-22 01:55:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.98989898989899) internal successors, (5925), 1485 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5925 transitions. [2021-05-22 01:55:14,819 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5925 transitions. Word has length 25 [2021-05-22 01:55:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:14,819 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5925 transitions. [2021-05-22 01:55:14,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5925 transitions. [2021-05-22 01:55:14,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:14,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:14,822 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:14,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 01:55:14,822 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:14,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1853761475, now seen corresponding path program 33 times [2021-05-22 01:55:14,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:14,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698724440] [2021-05-22 01:55:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:14,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:14,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698724440] [2021-05-22 01:55:14,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698724440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:14,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:14,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:14,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782636446] [2021-05-22 01:55:14,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:14,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:14,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:14,933 INFO L87 Difference]: Start difference. First operand 1486 states and 5925 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:15,008 INFO L93 Difference]: Finished difference Result 3058 states and 11363 transitions. [2021-05-22 01:55:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:15,014 INFO L225 Difference]: With dead ends: 3058 [2021-05-22 01:55:15,014 INFO L226 Difference]: Without dead ends: 2899 [2021-05-22 01:55:15,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-05-22 01:55:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1502. [2021-05-22 01:55:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.979347101932045) internal successors, (5973), 1501 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5973 transitions. [2021-05-22 01:55:15,053 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5973 transitions. Word has length 25 [2021-05-22 01:55:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:15,053 INFO L482 AbstractCegarLoop]: Abstraction has 1502 states and 5973 transitions. [2021-05-22 01:55:15,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5973 transitions. [2021-05-22 01:55:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:15,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:15,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:15,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 01:55:15,056 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash -173264835, now seen corresponding path program 34 times [2021-05-22 01:55:15,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:15,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414130366] [2021-05-22 01:55:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:15,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:15,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414130366] [2021-05-22 01:55:15,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414130366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:15,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333068373] [2021-05-22 01:55:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:15,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:15,168 INFO L87 Difference]: Start difference. First operand 1502 states and 5973 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:15,271 INFO L93 Difference]: Finished difference Result 3082 states and 11439 transitions. [2021-05-22 01:55:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:15,278 INFO L225 Difference]: With dead ends: 3082 [2021-05-22 01:55:15,278 INFO L226 Difference]: Without dead ends: 2883 [2021-05-22 01:55:15,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-05-22 01:55:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1486. [2021-05-22 01:55:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.9845117845117843) internal successors, (5917), 1485 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5917 transitions. [2021-05-22 01:55:15,331 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5917 transitions. Word has length 25 [2021-05-22 01:55:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:15,332 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5917 transitions. [2021-05-22 01:55:15,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5917 transitions. [2021-05-22 01:55:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:15,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:15,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:15,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 01:55:15,335 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1514981437, now seen corresponding path program 35 times [2021-05-22 01:55:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:15,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566845033] [2021-05-22 01:55:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:15,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:15,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566845033] [2021-05-22 01:55:15,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566845033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:15,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:15,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664483965] [2021-05-22 01:55:15,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:15,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:15,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:15,465 INFO L87 Difference]: Start difference. First operand 1486 states and 5917 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:15,553 INFO L93 Difference]: Finished difference Result 3173 states and 11786 transitions. [2021-05-22 01:55:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:15,561 INFO L225 Difference]: With dead ends: 3173 [2021-05-22 01:55:15,561 INFO L226 Difference]: Without dead ends: 2990 [2021-05-22 01:55:15,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-05-22 01:55:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 1530. [2021-05-22 01:55:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.9692609548724658) internal successors, (6069), 1529 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 6069 transitions. [2021-05-22 01:55:15,604 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 6069 transitions. Word has length 25 [2021-05-22 01:55:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:15,604 INFO L482 AbstractCegarLoop]: Abstraction has 1530 states and 6069 transitions. [2021-05-22 01:55:15,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 6069 transitions. [2021-05-22 01:55:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:15,607 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:15,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:15,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 01:55:15,607 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:15,607 INFO L82 PathProgramCache]: Analyzing trace with hash 510649499, now seen corresponding path program 36 times [2021-05-22 01:55:15,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:15,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827432613] [2021-05-22 01:55:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:15,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827432613] [2021-05-22 01:55:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827432613] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:15,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589536639] [2021-05-22 01:55:15,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:15,718 INFO L87 Difference]: Start difference. First operand 1530 states and 6069 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:15,808 INFO L93 Difference]: Finished difference Result 3212 states and 11889 transitions. [2021-05-22 01:55:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:15,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:15,815 INFO L225 Difference]: With dead ends: 3212 [2021-05-22 01:55:15,815 INFO L226 Difference]: Without dead ends: 2930 [2021-05-22 01:55:15,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-05-22 01:55:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1470. [2021-05-22 01:55:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.989788972089857) internal successors, (5861), 1469 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5861 transitions. [2021-05-22 01:55:15,868 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5861 transitions. Word has length 25 [2021-05-22 01:55:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:15,868 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5861 transitions. [2021-05-22 01:55:15,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5861 transitions. [2021-05-22 01:55:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:15,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:15,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:15,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 01:55:15,872 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1102019447, now seen corresponding path program 37 times [2021-05-22 01:55:15,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:15,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860108192] [2021-05-22 01:55:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:15,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:15,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860108192] [2021-05-22 01:55:15,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860108192] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:15,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:15,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:15,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796222416] [2021-05-22 01:55:15,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:15,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:15,991 INFO L87 Difference]: Start difference. First operand 1470 states and 5861 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:16,073 INFO L93 Difference]: Finished difference Result 2991 states and 11110 transitions. [2021-05-22 01:55:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:16,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:16,079 INFO L225 Difference]: With dead ends: 2991 [2021-05-22 01:55:16,079 INFO L226 Difference]: Without dead ends: 2832 [2021-05-22 01:55:16,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-05-22 01:55:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1494. [2021-05-22 01:55:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.9819156061620897) internal successors, (5945), 1493 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5945 transitions. [2021-05-22 01:55:16,116 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5945 transitions. Word has length 25 [2021-05-22 01:55:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:16,116 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5945 transitions. [2021-05-22 01:55:16,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5945 transitions. [2021-05-22 01:55:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:16,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:16,119 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:16,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 01:55:16,119 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:16,119 INFO L82 PathProgramCache]: Analyzing trace with hash -487915303, now seen corresponding path program 38 times [2021-05-22 01:55:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631319453] [2021-05-22 01:55:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:16,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631319453] [2021-05-22 01:55:16,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631319453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:16,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:16,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:16,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238903955] [2021-05-22 01:55:16,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:16,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:16,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:16,221 INFO L87 Difference]: Start difference. First operand 1494 states and 5945 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:16,297 INFO L93 Difference]: Finished difference Result 3021 states and 11203 transitions. [2021-05-22 01:55:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:16,303 INFO L225 Difference]: With dead ends: 3021 [2021-05-22 01:55:16,303 INFO L226 Difference]: Without dead ends: 2816 [2021-05-22 01:55:16,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2021-05-22 01:55:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 1478. [2021-05-22 01:55:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.987136086662153) internal successors, (5889), 1477 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 5889 transitions. [2021-05-22 01:55:16,342 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 5889 transitions. Word has length 25 [2021-05-22 01:55:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:16,342 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 5889 transitions. [2021-05-22 01:55:16,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 5889 transitions. [2021-05-22 01:55:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:16,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:16,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:16,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 01:55:16,345 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash 895211481, now seen corresponding path program 39 times [2021-05-22 01:55:16,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:16,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393986630] [2021-05-22 01:55:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:16,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:16,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393986630] [2021-05-22 01:55:16,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393986630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:16,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:16,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:16,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116355583] [2021-05-22 01:55:16,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:16,443 INFO L87 Difference]: Start difference. First operand 1478 states and 5889 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:16,504 INFO L93 Difference]: Finished difference Result 2985 states and 11085 transitions. [2021-05-22 01:55:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:16,510 INFO L225 Difference]: With dead ends: 2985 [2021-05-22 01:55:16,510 INFO L226 Difference]: Without dead ends: 2826 [2021-05-22 01:55:16,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-05-22 01:55:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 1494. [2021-05-22 01:55:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.9765572672471534) internal successors, (5937), 1493 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5937 transitions. [2021-05-22 01:55:16,547 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5937 transitions. Word has length 25 [2021-05-22 01:55:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:16,547 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5937 transitions. [2021-05-22 01:55:16,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5937 transitions. [2021-05-22 01:55:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:16,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:16,549 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:16,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 01:55:16,549 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1719259175, now seen corresponding path program 40 times [2021-05-22 01:55:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:16,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959704916] [2021-05-22 01:55:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:16,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959704916] [2021-05-22 01:55:16,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959704916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:16,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:16,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:16,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828148799] [2021-05-22 01:55:16,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:16,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:16,666 INFO L87 Difference]: Start difference. First operand 1494 states and 5937 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:16,754 INFO L93 Difference]: Finished difference Result 3009 states and 11161 transitions. [2021-05-22 01:55:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:16,759 INFO L225 Difference]: With dead ends: 3009 [2021-05-22 01:55:16,760 INFO L226 Difference]: Without dead ends: 2810 [2021-05-22 01:55:16,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-05-22 01:55:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1478. [2021-05-22 01:55:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.981719702098849) internal successors, (5881), 1477 states have internal predecessors, (5881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 5881 transitions. [2021-05-22 01:55:16,794 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 5881 transitions. Word has length 25 [2021-05-22 01:55:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:16,794 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 5881 transitions. [2021-05-22 01:55:16,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 5881 transitions. [2021-05-22 01:55:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:16,796 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:16,796 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:16,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 01:55:16,796 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1982593861, now seen corresponding path program 41 times [2021-05-22 01:55:16,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:16,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982370721] [2021-05-22 01:55:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:16,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982370721] [2021-05-22 01:55:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982370721] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:16,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:16,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:16,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372130506] [2021-05-22 01:55:16,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:16,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:16,883 INFO L87 Difference]: Start difference. First operand 1478 states and 5881 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:16,947 INFO L93 Difference]: Finished difference Result 3057 states and 11347 transitions. [2021-05-22 01:55:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:16,953 INFO L225 Difference]: With dead ends: 3057 [2021-05-22 01:55:16,953 INFO L226 Difference]: Without dead ends: 2868 [2021-05-22 01:55:16,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-05-22 01:55:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1506. [2021-05-22 01:55:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.966112956810631) internal successors, (5969), 1505 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5969 transitions. [2021-05-22 01:55:16,991 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5969 transitions. Word has length 25 [2021-05-22 01:55:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:16,991 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5969 transitions. [2021-05-22 01:55:16,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5969 transitions. [2021-05-22 01:55:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:16,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:16,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:16,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 01:55:16,993 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash 920228889, now seen corresponding path program 42 times [2021-05-22 01:55:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:16,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18736914] [2021-05-22 01:55:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:17,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:17,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18736914] [2021-05-22 01:55:17,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18736914] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:17,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:17,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598789339] [2021-05-22 01:55:17,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:17,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:17,087 INFO L87 Difference]: Start difference. First operand 1506 states and 5969 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:17,155 INFO L93 Difference]: Finished difference Result 3051 states and 11302 transitions. [2021-05-22 01:55:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:17,161 INFO L225 Difference]: With dead ends: 3051 [2021-05-22 01:55:17,161 INFO L226 Difference]: Without dead ends: 2832 [2021-05-22 01:55:17,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-05-22 01:55:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1470. [2021-05-22 01:55:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.987066031313819) internal successors, (5857), 1469 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5857 transitions. [2021-05-22 01:55:17,212 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5857 transitions. Word has length 25 [2021-05-22 01:55:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:17,212 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5857 transitions. [2021-05-22 01:55:17,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5857 transitions. [2021-05-22 01:55:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:17,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:17,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:17,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 01:55:17,214 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:17,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1077380579, now seen corresponding path program 43 times [2021-05-22 01:55:17,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:17,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493766966] [2021-05-22 01:55:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:17,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:17,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493766966] [2021-05-22 01:55:17,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493766966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:17,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:17,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:17,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687370442] [2021-05-22 01:55:17,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:17,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:17,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:17,328 INFO L87 Difference]: Start difference. First operand 1470 states and 5857 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:17,399 INFO L93 Difference]: Finished difference Result 3217 states and 11965 transitions. [2021-05-22 01:55:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:17,405 INFO L225 Difference]: With dead ends: 3217 [2021-05-22 01:55:17,405 INFO L226 Difference]: Without dead ends: 3028 [2021-05-22 01:55:17,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-22 01:55:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1528. [2021-05-22 01:55:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.97773411918795) internal successors, (6074), 1527 states have internal predecessors, (6074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 6074 transitions. [2021-05-22 01:55:17,447 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 6074 transitions. Word has length 25 [2021-05-22 01:55:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:17,447 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 6074 transitions. [2021-05-22 01:55:17,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 6074 transitions. [2021-05-22 01:55:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:17,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:17,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:17,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 01:55:17,451 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1825442171, now seen corresponding path program 44 times [2021-05-22 01:55:17,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:17,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884007983] [2021-05-22 01:55:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:17,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:17,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884007983] [2021-05-22 01:55:17,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884007983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:17,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:17,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:17,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572364279] [2021-05-22 01:55:17,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:17,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:17,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:17,541 INFO L87 Difference]: Start difference. First operand 1528 states and 6074 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:17,608 INFO L93 Difference]: Finished difference Result 3211 states and 11920 transitions. [2021-05-22 01:55:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:17,614 INFO L225 Difference]: With dead ends: 3211 [2021-05-22 01:55:17,615 INFO L226 Difference]: Without dead ends: 3000 [2021-05-22 01:55:17,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-05-22 01:55:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 1500. [2021-05-22 01:55:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.983989326217478) internal successors, (5972), 1499 states have internal predecessors, (5972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5972 transitions. [2021-05-22 01:55:17,653 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5972 transitions. Word has length 25 [2021-05-22 01:55:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 5972 transitions. [2021-05-22 01:55:17,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5972 transitions. [2021-05-22 01:55:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:17,655 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:17,655 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:17,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-22 01:55:17,655 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash 127268603, now seen corresponding path program 45 times [2021-05-22 01:55:17,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:17,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601389097] [2021-05-22 01:55:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:17,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:17,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601389097] [2021-05-22 01:55:17,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601389097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:17,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:17,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310971700] [2021-05-22 01:55:17,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:17,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:17,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:17,755 INFO L87 Difference]: Start difference. First operand 1500 states and 5972 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:17,827 INFO L93 Difference]: Finished difference Result 3291 states and 12204 transitions. [2021-05-22 01:55:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:17,833 INFO L225 Difference]: With dead ends: 3291 [2021-05-22 01:55:17,833 INFO L226 Difference]: Without dead ends: 3102 [2021-05-22 01:55:17,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2021-05-22 01:55:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 1563. [2021-05-22 01:55:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.9558258642765685) internal successors, (6179), 1562 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 6179 transitions. [2021-05-22 01:55:17,874 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 6179 transitions. Word has length 25 [2021-05-22 01:55:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:17,874 INFO L482 AbstractCegarLoop]: Abstraction has 1563 states and 6179 transitions. [2021-05-22 01:55:17,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 6179 transitions. [2021-05-22 01:55:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:17,877 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:17,877 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:17,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-22 01:55:17,877 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:17,877 INFO L82 PathProgramCache]: Analyzing trace with hash 859350907, now seen corresponding path program 46 times [2021-05-22 01:55:17,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:17,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668495937] [2021-05-22 01:55:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:17,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668495937] [2021-05-22 01:55:17,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668495937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:17,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:17,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:17,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426969652] [2021-05-22 01:55:17,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:17,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:17,983 INFO L87 Difference]: Start difference. First operand 1563 states and 6179 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:18,049 INFO L93 Difference]: Finished difference Result 3324 states and 12287 transitions. [2021-05-22 01:55:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:18,057 INFO L225 Difference]: With dead ends: 3324 [2021-05-22 01:55:18,057 INFO L226 Difference]: Without dead ends: 3039 [2021-05-22 01:55:18,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-05-22 01:55:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1500. [2021-05-22 01:55:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.963975983989326) internal successors, (5942), 1499 states have internal predecessors, (5942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5942 transitions. [2021-05-22 01:55:18,137 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5942 transitions. Word has length 25 [2021-05-22 01:55:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:18,137 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 5942 transitions. [2021-05-22 01:55:18,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5942 transitions. [2021-05-22 01:55:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:18,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:18,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-22 01:55:18,140 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:18,140 INFO L82 PathProgramCache]: Analyzing trace with hash 491525977, now seen corresponding path program 47 times [2021-05-22 01:55:18,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:18,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599862155] [2021-05-22 01:55:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:18,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:18,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599862155] [2021-05-22 01:55:18,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599862155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:18,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:18,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:18,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994468080] [2021-05-22 01:55:18,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:18,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:18,246 INFO L87 Difference]: Start difference. First operand 1500 states and 5942 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:18,319 INFO L93 Difference]: Finished difference Result 3260 states and 12082 transitions. [2021-05-22 01:55:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:18,325 INFO L225 Difference]: With dead ends: 3260 [2021-05-22 01:55:18,326 INFO L226 Difference]: Without dead ends: 3077 [2021-05-22 01:55:18,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-05-22 01:55:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 1544. [2021-05-22 01:55:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.949449125081011) internal successors, (6094), 1543 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 6094 transitions. [2021-05-22 01:55:18,367 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 6094 transitions. Word has length 25 [2021-05-22 01:55:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:18,367 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 6094 transitions. [2021-05-22 01:55:18,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 6094 transitions. [2021-05-22 01:55:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:18,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:18,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:18,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-22 01:55:18,369 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash -577993029, now seen corresponding path program 48 times [2021-05-22 01:55:18,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:18,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686966267] [2021-05-22 01:55:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:18,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686966267] [2021-05-22 01:55:18,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686966267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:18,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:18,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18795564] [2021-05-22 01:55:18,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:18,473 INFO L87 Difference]: Start difference. First operand 1544 states and 6094 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:18,526 INFO L93 Difference]: Finished difference Result 3299 states and 12185 transitions. [2021-05-22 01:55:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:18,533 INFO L225 Difference]: With dead ends: 3299 [2021-05-22 01:55:18,533 INFO L226 Difference]: Without dead ends: 2991 [2021-05-22 01:55:18,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-05-22 01:55:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1458. [2021-05-22 01:55:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.9938229238160603) internal successors, (5819), 1457 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5819 transitions. [2021-05-22 01:55:18,571 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5819 transitions. Word has length 25 [2021-05-22 01:55:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:18,571 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5819 transitions. [2021-05-22 01:55:18,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5819 transitions. [2021-05-22 01:55:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:18,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:18,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:18,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-22 01:55:18,573 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 483139259, now seen corresponding path program 49 times [2021-05-22 01:55:18,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:18,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988974877] [2021-05-22 01:55:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:18,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:18,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988974877] [2021-05-22 01:55:18,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988974877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:18,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:18,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:18,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091733570] [2021-05-22 01:55:18,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:18,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:18,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:18,689 INFO L87 Difference]: Start difference. First operand 1458 states and 5819 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:18,742 INFO L93 Difference]: Finished difference Result 3080 states and 11471 transitions. [2021-05-22 01:55:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:18,747 INFO L225 Difference]: With dead ends: 3080 [2021-05-22 01:55:18,748 INFO L226 Difference]: Without dead ends: 2921 [2021-05-22 01:55:18,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-22 01:55:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1514. [2021-05-22 01:55:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.994051553205552) internal successors, (6043), 1513 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 6043 transitions. [2021-05-22 01:55:18,786 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 6043 transitions. Word has length 25 [2021-05-22 01:55:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:18,786 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 6043 transitions. [2021-05-22 01:55:18,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 6043 transitions. [2021-05-22 01:55:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:18,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:18,788 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:18,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-22 01:55:18,789 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash -525158725, now seen corresponding path program 50 times [2021-05-22 01:55:18,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:18,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096398222] [2021-05-22 01:55:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:18,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:18,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096398222] [2021-05-22 01:55:18,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096398222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:18,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:18,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284003772] [2021-05-22 01:55:18,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:18,903 INFO L87 Difference]: Start difference. First operand 1514 states and 6043 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:18,969 INFO L93 Difference]: Finished difference Result 3143 states and 11678 transitions. [2021-05-22 01:55:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:18,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:18,975 INFO L225 Difference]: With dead ends: 3143 [2021-05-22 01:55:18,975 INFO L226 Difference]: Without dead ends: 2889 [2021-05-22 01:55:18,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-05-22 01:55:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 1482. [2021-05-22 01:55:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.9939230249831197) internal successors, (5915), 1481 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5915 transitions. [2021-05-22 01:55:19,014 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5915 transitions. Word has length 25 [2021-05-22 01:55:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:19,014 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5915 transitions. [2021-05-22 01:55:19,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5915 transitions. [2021-05-22 01:55:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:19,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:19,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:19,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-22 01:55:19,017 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1472172765, now seen corresponding path program 51 times [2021-05-22 01:55:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:19,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131250238] [2021-05-22 01:55:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:19,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:19,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131250238] [2021-05-22 01:55:19,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131250238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:19,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:19,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:19,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855323502] [2021-05-22 01:55:19,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:19,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:19,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:19,134 INFO L87 Difference]: Start difference. First operand 1482 states and 5915 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:19,204 INFO L93 Difference]: Finished difference Result 3029 states and 11272 transitions. [2021-05-22 01:55:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:19,212 INFO L225 Difference]: With dead ends: 3029 [2021-05-22 01:55:19,212 INFO L226 Difference]: Without dead ends: 2870 [2021-05-22 01:55:19,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-05-22 01:55:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1498. [2021-05-22 01:55:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.9832999331997327) internal successors, (5963), 1497 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5963 transitions. [2021-05-22 01:55:19,249 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5963 transitions. Word has length 25 [2021-05-22 01:55:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:19,249 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5963 transitions. [2021-05-22 01:55:19,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5963 transitions. [2021-05-22 01:55:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:19,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:19,252 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:19,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-22 01:55:19,252 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1814496547, now seen corresponding path program 52 times [2021-05-22 01:55:19,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:19,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6996010] [2021-05-22 01:55:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:19,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:19,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6996010] [2021-05-22 01:55:19,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6996010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:19,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:19,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:19,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003212815] [2021-05-22 01:55:19,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:19,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:19,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:19,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:19,371 INFO L87 Difference]: Start difference. First operand 1498 states and 5963 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:19,449 INFO L93 Difference]: Finished difference Result 3057 states and 11360 transitions. [2021-05-22 01:55:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:19,456 INFO L225 Difference]: With dead ends: 3057 [2021-05-22 01:55:19,456 INFO L226 Difference]: Without dead ends: 2854 [2021-05-22 01:55:19,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-05-22 01:55:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1482. [2021-05-22 01:55:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.988521269412559) internal successors, (5907), 1481 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5907 transitions. [2021-05-22 01:55:19,540 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5907 transitions. Word has length 25 [2021-05-22 01:55:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:19,540 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5907 transitions. [2021-05-22 01:55:19,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5907 transitions. [2021-05-22 01:55:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:19,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:19,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:19,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-22 01:55:19,543 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash -126250275, now seen corresponding path program 53 times [2021-05-22 01:55:19,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:19,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049041563] [2021-05-22 01:55:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:19,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049041563] [2021-05-22 01:55:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049041563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:19,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:19,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:19,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054030680] [2021-05-22 01:55:19,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:19,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:19,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:19,664 INFO L87 Difference]: Start difference. First operand 1482 states and 5907 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:19,751 INFO L93 Difference]: Finished difference Result 3150 states and 11714 transitions. [2021-05-22 01:55:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:19,758 INFO L225 Difference]: With dead ends: 3150 [2021-05-22 01:55:19,758 INFO L226 Difference]: Without dead ends: 2963 [2021-05-22 01:55:19,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-05-22 01:55:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 1528. [2021-05-22 01:55:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.971185330713818) internal successors, (6064), 1527 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 6064 transitions. [2021-05-22 01:55:19,803 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 6064 transitions. Word has length 25 [2021-05-22 01:55:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:19,803 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 6064 transitions. [2021-05-22 01:55:19,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 6064 transitions. [2021-05-22 01:55:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:19,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:19,805 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:19,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-22 01:55:19,805 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:19,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:19,806 INFO L82 PathProgramCache]: Analyzing trace with hash -479389765, now seen corresponding path program 54 times [2021-05-22 01:55:19,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:19,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823033487] [2021-05-22 01:55:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:19,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823033487] [2021-05-22 01:55:19,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823033487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:19,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:19,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:19,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610253882] [2021-05-22 01:55:19,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:19,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:19,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:19,911 INFO L87 Difference]: Start difference. First operand 1528 states and 6064 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:19,971 INFO L93 Difference]: Finished difference Result 3185 states and 11803 transitions. [2021-05-22 01:55:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:19,978 INFO L225 Difference]: With dead ends: 3185 [2021-05-22 01:55:19,978 INFO L226 Difference]: Without dead ends: 2901 [2021-05-22 01:55:19,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-05-22 01:55:20,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1466. [2021-05-22 01:55:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 3.9938566552901023) internal successors, (5851), 1465 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 5851 transitions. [2021-05-22 01:55:20,021 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 5851 transitions. Word has length 25 [2021-05-22 01:55:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:20,021 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 5851 transitions. [2021-05-22 01:55:20,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 5851 transitions. [2021-05-22 01:55:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:20,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:20,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:20,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-22 01:55:20,023 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:20,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2102226275, now seen corresponding path program 55 times [2021-05-22 01:55:20,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:20,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93531979] [2021-05-22 01:55:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:20,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:20,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93531979] [2021-05-22 01:55:20,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93531979] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:20,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:20,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:20,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634001397] [2021-05-22 01:55:20,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:20,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:20,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:20,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:20,132 INFO L87 Difference]: Start difference. First operand 1466 states and 5851 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:20,188 INFO L93 Difference]: Finished difference Result 3074 states and 11444 transitions. [2021-05-22 01:55:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:20,194 INFO L225 Difference]: With dead ends: 3074 [2021-05-22 01:55:20,194 INFO L226 Difference]: Without dead ends: 2915 [2021-05-22 01:55:20,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-05-22 01:55:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 1514. [2021-05-22 01:55:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.9887640449438204) internal successors, (6035), 1513 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 6035 transitions. [2021-05-22 01:55:20,230 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 6035 transitions. Word has length 25 [2021-05-22 01:55:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:20,230 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 6035 transitions. [2021-05-22 01:55:20,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 6035 transitions. [2021-05-22 01:55:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:20,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:20,232 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:20,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-22 01:55:20,233 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1184443037, now seen corresponding path program 56 times [2021-05-22 01:55:20,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:20,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647959235] [2021-05-22 01:55:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:20,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647959235] [2021-05-22 01:55:20,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647959235] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:20,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:20,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:20,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475970102] [2021-05-22 01:55:20,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:20,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:20,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:20,352 INFO L87 Difference]: Start difference. First operand 1514 states and 6035 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:20,428 INFO L93 Difference]: Finished difference Result 3137 states and 11651 transitions. [2021-05-22 01:55:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:20,435 INFO L225 Difference]: With dead ends: 3137 [2021-05-22 01:55:20,435 INFO L226 Difference]: Without dead ends: 2883 [2021-05-22 01:55:20,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-05-22 01:55:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1482. [2021-05-22 01:55:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.988521269412559) internal successors, (5907), 1481 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5907 transitions. [2021-05-22 01:55:20,487 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5907 transitions. Word has length 25 [2021-05-22 01:55:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:20,487 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5907 transitions. [2021-05-22 01:55:20,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5907 transitions. [2021-05-22 01:55:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:20,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:20,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:20,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-22 01:55:20,490 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2096473507, now seen corresponding path program 57 times [2021-05-22 01:55:20,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:20,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811498730] [2021-05-22 01:55:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:20,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:20,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811498730] [2021-05-22 01:55:20,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811498730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:20,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:20,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:20,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688727567] [2021-05-22 01:55:20,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:20,602 INFO L87 Difference]: Start difference. First operand 1482 states and 5907 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:20,680 INFO L93 Difference]: Finished difference Result 3019 states and 11233 transitions. [2021-05-22 01:55:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:20,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:20,687 INFO L225 Difference]: With dead ends: 3019 [2021-05-22 01:55:20,687 INFO L226 Difference]: Without dead ends: 2860 [2021-05-22 01:55:20,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-05-22 01:55:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1498. [2021-05-22 01:55:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.9779559118236474) internal successors, (5955), 1497 states have internal predecessors, (5955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5955 transitions. [2021-05-22 01:55:20,740 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5955 transitions. Word has length 25 [2021-05-22 01:55:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:20,740 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5955 transitions. [2021-05-22 01:55:20,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5955 transitions. [2021-05-22 01:55:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:20,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:20,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:20,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-22 01:55:20,743 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash -415976867, now seen corresponding path program 58 times [2021-05-22 01:55:20,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:20,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325551245] [2021-05-22 01:55:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:20,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:20,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325551245] [2021-05-22 01:55:20,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325551245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:20,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:20,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191586762] [2021-05-22 01:55:20,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:20,853 INFO L87 Difference]: Start difference. First operand 1498 states and 5955 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:20,941 INFO L93 Difference]: Finished difference Result 3043 states and 11309 transitions. [2021-05-22 01:55:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:20,948 INFO L225 Difference]: With dead ends: 3043 [2021-05-22 01:55:20,949 INFO L226 Difference]: Without dead ends: 2844 [2021-05-22 01:55:20,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-05-22 01:55:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 1482. [2021-05-22 01:55:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.9831195138419986) internal successors, (5899), 1481 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5899 transitions. [2021-05-22 01:55:20,998 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5899 transitions. Word has length 25 [2021-05-22 01:55:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:20,998 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5899 transitions. [2021-05-22 01:55:20,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5899 transitions. [2021-05-22 01:55:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:21,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:21,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:21,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-22 01:55:21,002 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1272269405, now seen corresponding path program 59 times [2021-05-22 01:55:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:21,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492339916] [2021-05-22 01:55:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:21,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492339916] [2021-05-22 01:55:21,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492339916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:21,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:21,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:21,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284067910] [2021-05-22 01:55:21,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:21,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:21,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:21,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:21,131 INFO L87 Difference]: Start difference. First operand 1482 states and 5899 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:21,213 INFO L93 Difference]: Finished difference Result 3134 states and 11656 transitions. [2021-05-22 01:55:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:21,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:21,220 INFO L225 Difference]: With dead ends: 3134 [2021-05-22 01:55:21,221 INFO L226 Difference]: Without dead ends: 2951 [2021-05-22 01:55:21,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-05-22 01:55:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 1526. [2021-05-22 01:55:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 3.9678688524590164) internal successors, (6051), 1525 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6051 transitions. [2021-05-22 01:55:21,276 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6051 transitions. Word has length 25 [2021-05-22 01:55:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:21,277 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6051 transitions. [2021-05-22 01:55:21,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6051 transitions. [2021-05-22 01:55:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:21,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:21,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:21,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-22 01:55:21,281 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 267937467, now seen corresponding path program 60 times [2021-05-22 01:55:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:21,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013205058] [2021-05-22 01:55:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:21,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:21,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013205058] [2021-05-22 01:55:21,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013205058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:21,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:21,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:21,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768002211] [2021-05-22 01:55:21,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:21,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:21,412 INFO L87 Difference]: Start difference. First operand 1526 states and 6051 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:21,464 INFO L93 Difference]: Finished difference Result 3173 states and 11759 transitions. [2021-05-22 01:55:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:21,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:21,471 INFO L225 Difference]: With dead ends: 3173 [2021-05-22 01:55:21,471 INFO L226 Difference]: Without dead ends: 2891 [2021-05-22 01:55:21,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2021-05-22 01:55:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 1466. [2021-05-22 01:55:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 3.98839590443686) internal successors, (5843), 1465 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 5843 transitions. [2021-05-22 01:55:21,510 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 5843 transitions. Word has length 25 [2021-05-22 01:55:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:21,510 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 5843 transitions. [2021-05-22 01:55:21,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 5843 transitions. [2021-05-22 01:55:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:21,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:21,513 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:21,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-22 01:55:21,513 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1734106623, now seen corresponding path program 61 times [2021-05-22 01:55:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491021030] [2021-05-22 01:55:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:21,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491021030] [2021-05-22 01:55:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491021030] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:21,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:21,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592881589] [2021-05-22 01:55:21,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:21,625 INFO L87 Difference]: Start difference. First operand 1466 states and 5843 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:21,699 INFO L93 Difference]: Finished difference Result 2948 states and 10970 transitions. [2021-05-22 01:55:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:21,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:21,706 INFO L225 Difference]: With dead ends: 2948 [2021-05-22 01:55:21,706 INFO L226 Difference]: Without dead ends: 2789 [2021-05-22 01:55:21,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-05-22 01:55:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 1490. [2021-05-22 01:55:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.9805238415043656) internal successors, (5927), 1489 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5927 transitions. [2021-05-22 01:55:21,758 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5927 transitions. Word has length 25 [2021-05-22 01:55:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:21,758 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5927 transitions. [2021-05-22 01:55:21,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5927 transitions. [2021-05-22 01:55:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:21,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:21,761 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:21,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-22 01:55:21,761 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1552562689, now seen corresponding path program 62 times [2021-05-22 01:55:21,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:21,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772416356] [2021-05-22 01:55:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:21,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:21,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772416356] [2021-05-22 01:55:21,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772416356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:21,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:21,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471232297] [2021-05-22 01:55:21,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:21,871 INFO L87 Difference]: Start difference. First operand 1490 states and 5927 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:21,961 INFO L93 Difference]: Finished difference Result 2976 states and 11058 transitions. [2021-05-22 01:55:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:21,968 INFO L225 Difference]: With dead ends: 2976 [2021-05-22 01:55:21,968 INFO L226 Difference]: Without dead ends: 2773 [2021-05-22 01:55:21,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-05-22 01:55:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1474. [2021-05-22 01:55:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.9857433808553973) internal successors, (5871), 1473 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5871 transitions. [2021-05-22 01:55:22,017 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5871 transitions. Word has length 25 [2021-05-22 01:55:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:22,018 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5871 transitions. [2021-05-22 01:55:22,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5871 transitions. [2021-05-22 01:55:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:22,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:22,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:22,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-22 01:55:22,021 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 887309661, now seen corresponding path program 63 times [2021-05-22 01:55:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:22,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752710002] [2021-05-22 01:55:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:22,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:22,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752710002] [2021-05-22 01:55:22,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752710002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:22,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:22,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:22,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929335952] [2021-05-22 01:55:22,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:22,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:22,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:22,117 INFO L87 Difference]: Start difference. First operand 1474 states and 5871 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:22,179 INFO L93 Difference]: Finished difference Result 2944 states and 10950 transitions. [2021-05-22 01:55:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:22,184 INFO L225 Difference]: With dead ends: 2944 [2021-05-22 01:55:22,184 INFO L226 Difference]: Without dead ends: 2785 [2021-05-22 01:55:22,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-05-22 01:55:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 1490. [2021-05-22 01:55:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.9751511081262594) internal successors, (5919), 1489 states have internal predecessors, (5919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5919 transitions. [2021-05-22 01:55:22,220 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5919 transitions. Word has length 25 [2021-05-22 01:55:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:22,220 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5919 transitions. [2021-05-22 01:55:22,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5919 transitions. [2021-05-22 01:55:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:22,223 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:22,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:22,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-22 01:55:22,223 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 857449983, now seen corresponding path program 64 times [2021-05-22 01:55:22,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:22,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135877676] [2021-05-22 01:55:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:22,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:22,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135877676] [2021-05-22 01:55:22,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135877676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:22,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:22,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665501606] [2021-05-22 01:55:22,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:22,319 INFO L87 Difference]: Start difference. First operand 1490 states and 5919 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:22,399 INFO L93 Difference]: Finished difference Result 2968 states and 11026 transitions. [2021-05-22 01:55:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:22,404 INFO L225 Difference]: With dead ends: 2968 [2021-05-22 01:55:22,405 INFO L226 Difference]: Without dead ends: 2769 [2021-05-22 01:55:22,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-05-22 01:55:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1474. [2021-05-22 01:55:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.9803122878479296) internal successors, (5863), 1473 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5863 transitions. [2021-05-22 01:55:22,440 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5863 transitions. Word has length 25 [2021-05-22 01:55:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:22,440 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5863 transitions. [2021-05-22 01:55:22,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5863 transitions. [2021-05-22 01:55:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:22,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:22,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:22,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-22 01:55:22,443 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1502994945, now seen corresponding path program 65 times [2021-05-22 01:55:22,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:22,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412460625] [2021-05-22 01:55:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:22,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:22,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412460625] [2021-05-22 01:55:22,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412460625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:22,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:22,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:22,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380898967] [2021-05-22 01:55:22,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:22,535 INFO L87 Difference]: Start difference. First operand 1474 states and 5863 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:22,621 INFO L93 Difference]: Finished difference Result 3012 states and 11202 transitions. [2021-05-22 01:55:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:22,628 INFO L225 Difference]: With dead ends: 3012 [2021-05-22 01:55:22,628 INFO L226 Difference]: Without dead ends: 2825 [2021-05-22 01:55:22,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-05-22 01:55:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1502. [2021-05-22 01:55:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.9646902065289806) internal successors, (5951), 1501 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5951 transitions. [2021-05-22 01:55:22,679 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5951 transitions. Word has length 25 [2021-05-22 01:55:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:22,679 INFO L482 AbstractCegarLoop]: Abstraction has 1502 states and 5951 transitions. [2021-05-22 01:55:22,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5951 transitions. [2021-05-22 01:55:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:22,682 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:22,682 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:22,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-22 01:55:22,682 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash 748635357, now seen corresponding path program 66 times [2021-05-22 01:55:22,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:22,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802844547] [2021-05-22 01:55:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:22,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:22,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802844547] [2021-05-22 01:55:22,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802844547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:22,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:22,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:22,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977957818] [2021-05-22 01:55:22,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:22,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:22,775 INFO L87 Difference]: Start difference. First operand 1502 states and 5951 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:22,864 INFO L93 Difference]: Finished difference Result 3008 states and 11162 transitions. [2021-05-22 01:55:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:22,871 INFO L225 Difference]: With dead ends: 3008 [2021-05-22 01:55:22,871 INFO L226 Difference]: Without dead ends: 2789 [2021-05-22 01:55:22,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-05-22 01:55:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 1466. [2021-05-22 01:55:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 3.9856655290102387) internal successors, (5839), 1465 states have internal predecessors, (5839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 5839 transitions. [2021-05-22 01:55:22,924 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 5839 transitions. Word has length 25 [2021-05-22 01:55:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:22,924 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 5839 transitions. [2021-05-22 01:55:22,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 5839 transitions. [2021-05-22 01:55:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:22,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:22,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:22,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-22 01:55:22,927 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:22,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1699001855, now seen corresponding path program 67 times [2021-05-22 01:55:22,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:22,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890010871] [2021-05-22 01:55:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:23,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890010871] [2021-05-22 01:55:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890010871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:23,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:23,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861111746] [2021-05-22 01:55:23,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:23,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:23,021 INFO L87 Difference]: Start difference. First operand 1466 states and 5839 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:23,089 INFO L93 Difference]: Finished difference Result 3147 states and 11741 transitions. [2021-05-22 01:55:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:23,095 INFO L225 Difference]: With dead ends: 3147 [2021-05-22 01:55:23,095 INFO L226 Difference]: Without dead ends: 2960 [2021-05-22 01:55:23,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-05-22 01:55:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 1516. [2021-05-22 01:55:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.9788778877887787) internal successors, (6028), 1515 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 6028 transitions. [2021-05-22 01:55:23,145 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 6028 transitions. Word has length 25 [2021-05-22 01:55:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:23,145 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 6028 transitions. [2021-05-22 01:55:23,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 6028 transitions. [2021-05-22 01:55:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:23,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:23,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:23,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-22 01:55:23,147 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -344335139, now seen corresponding path program 68 times [2021-05-22 01:55:23,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:23,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482679672] [2021-05-22 01:55:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:23,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:23,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482679672] [2021-05-22 01:55:23,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482679672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:23,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:23,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:23,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508089962] [2021-05-22 01:55:23,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:23,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:23,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:23,238 INFO L87 Difference]: Start difference. First operand 1516 states and 6028 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:23,314 INFO L93 Difference]: Finished difference Result 3143 states and 11701 transitions. [2021-05-22 01:55:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:23,321 INFO L225 Difference]: With dead ends: 3143 [2021-05-22 01:55:23,322 INFO L226 Difference]: Without dead ends: 2932 [2021-05-22 01:55:23,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-05-22 01:55:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1488. [2021-05-22 01:55:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.985205110961668) internal successors, (5926), 1487 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5926 transitions. [2021-05-22 01:55:23,373 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5926 transitions. Word has length 25 [2021-05-22 01:55:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:23,373 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 5926 transitions. [2021-05-22 01:55:23,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5926 transitions. [2021-05-22 01:55:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:23,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:23,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:23,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-22 01:55:23,376 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1391316259, now seen corresponding path program 69 times [2021-05-22 01:55:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:23,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543965993] [2021-05-22 01:55:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:23,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:23,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543965993] [2021-05-22 01:55:23,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543965993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:23,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:23,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:23,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561805080] [2021-05-22 01:55:23,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:23,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:23,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:23,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:23,467 INFO L87 Difference]: Start difference. First operand 1488 states and 5926 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:23,536 INFO L93 Difference]: Finished difference Result 3204 states and 11929 transitions. [2021-05-22 01:55:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:23,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:23,542 INFO L225 Difference]: With dead ends: 3204 [2021-05-22 01:55:23,542 INFO L226 Difference]: Without dead ends: 3017 [2021-05-22 01:55:23,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-05-22 01:55:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 1534. [2021-05-22 01:55:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.9680365296803655) internal successors, (6083), 1533 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 6083 transitions. [2021-05-22 01:55:23,579 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 6083 transitions. Word has length 25 [2021-05-22 01:55:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:23,579 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 6083 transitions. [2021-05-22 01:55:23,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 6083 transitions. [2021-05-22 01:55:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:23,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:23,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:23,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-22 01:55:23,581 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1310426403, now seen corresponding path program 70 times [2021-05-22 01:55:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:23,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278067068] [2021-05-22 01:55:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:23,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:23,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278067068] [2021-05-22 01:55:23,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278067068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:23,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:23,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:23,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709533445] [2021-05-22 01:55:23,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:23,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:23,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:23,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:23,675 INFO L87 Difference]: Start difference. First operand 1534 states and 6083 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:23,752 INFO L93 Difference]: Finished difference Result 3239 states and 12018 transitions. [2021-05-22 01:55:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:23,759 INFO L225 Difference]: With dead ends: 3239 [2021-05-22 01:55:23,759 INFO L226 Difference]: Without dead ends: 2971 [2021-05-22 01:55:23,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-05-22 01:55:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 1488. [2021-05-22 01:55:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.9704102219233355) internal successors, (5904), 1487 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5904 transitions. [2021-05-22 01:55:23,797 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5904 transitions. Word has length 25 [2021-05-22 01:55:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:23,797 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 5904 transitions. [2021-05-22 01:55:23,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5904 transitions. [2021-05-22 01:55:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:23,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:23,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:23,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-22 01:55:23,799 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:23,800 INFO L82 PathProgramCache]: Analyzing trace with hash -408968645, now seen corresponding path program 71 times [2021-05-22 01:55:23,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:23,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149649524] [2021-05-22 01:55:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:23,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:23,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149649524] [2021-05-22 01:55:23,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149649524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:23,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:23,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448817072] [2021-05-22 01:55:23,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:23,903 INFO L87 Difference]: Start difference. First operand 1488 states and 5904 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:23,999 INFO L93 Difference]: Finished difference Result 3194 states and 11876 transitions. [2021-05-22 01:55:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:24,005 INFO L225 Difference]: With dead ends: 3194 [2021-05-22 01:55:24,005 INFO L226 Difference]: Without dead ends: 3011 [2021-05-22 01:55:24,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-05-22 01:55:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 1532. [2021-05-22 01:55:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.955584585238406) internal successors, (6056), 1531 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 6056 transitions. [2021-05-22 01:55:24,048 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 6056 transitions. Word has length 25 [2021-05-22 01:55:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 6056 transitions. [2021-05-22 01:55:24,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 6056 transitions. [2021-05-22 01:55:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:24,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:24,051 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:24,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-22 01:55:24,051 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1478487651, now seen corresponding path program 72 times [2021-05-22 01:55:24,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:24,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615588038] [2021-05-22 01:55:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:24,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:24,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615588038] [2021-05-22 01:55:24,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615588038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:24,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:24,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640169213] [2021-05-22 01:55:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:24,155 INFO L87 Difference]: Start difference. First operand 1532 states and 6056 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:24,229 INFO L93 Difference]: Finished difference Result 3233 states and 11979 transitions. [2021-05-22 01:55:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:24,235 INFO L225 Difference]: With dead ends: 3233 [2021-05-22 01:55:24,235 INFO L226 Difference]: Without dead ends: 2937 [2021-05-22 01:55:24,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2021-05-22 01:55:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 1458. [2021-05-22 01:55:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.9910775566231984) internal successors, (5815), 1457 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5815 transitions. [2021-05-22 01:55:24,273 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5815 transitions. Word has length 25 [2021-05-22 01:55:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:24,273 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5815 transitions. [2021-05-22 01:55:24,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5815 transitions. [2021-05-22 01:55:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:24,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:24,275 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:24,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-22 01:55:24,275 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2109839913, now seen corresponding path program 73 times [2021-05-22 01:55:24,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:24,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443542158] [2021-05-22 01:55:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:24,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443542158] [2021-05-22 01:55:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443542158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:24,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:24,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128026872] [2021-05-22 01:55:24,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:24,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:24,383 INFO L87 Difference]: Start difference. First operand 1458 states and 5815 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:24,443 INFO L93 Difference]: Finished difference Result 2849 states and 10577 transitions. [2021-05-22 01:55:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:24,448 INFO L225 Difference]: With dead ends: 2849 [2021-05-22 01:55:24,448 INFO L226 Difference]: Without dead ends: 2690 [2021-05-22 01:55:24,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-05-22 01:55:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 1486. [2021-05-22 01:55:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.985858585858586) internal successors, (5919), 1485 states have internal predecessors, (5919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5919 transitions. [2021-05-22 01:55:24,493 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5919 transitions. Word has length 25 [2021-05-22 01:55:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:24,493 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5919 transitions. [2021-05-22 01:55:24,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5919 transitions. [2021-05-22 01:55:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:24,496 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:24,496 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-22 01:55:24,496 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 595192633, now seen corresponding path program 74 times [2021-05-22 01:55:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561321490] [2021-05-22 01:55:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:24,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561321490] [2021-05-22 01:55:24,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561321490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:24,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:24,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:24,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687465938] [2021-05-22 01:55:24,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:24,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:24,625 INFO L87 Difference]: Start difference. First operand 1486 states and 5919 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:24,701 INFO L93 Difference]: Finished difference Result 2879 states and 10670 transitions. [2021-05-22 01:55:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:24,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:24,706 INFO L225 Difference]: With dead ends: 2879 [2021-05-22 01:55:24,706 INFO L226 Difference]: Without dead ends: 2674 [2021-05-22 01:55:24,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-05-22 01:55:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1470. [2021-05-22 01:55:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.9911504424778763) internal successors, (5863), 1469 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5863 transitions. [2021-05-22 01:55:24,747 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5863 transitions. Word has length 25 [2021-05-22 01:55:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:24,747 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5863 transitions. [2021-05-22 01:55:24,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5863 transitions. [2021-05-22 01:55:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:24,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:24,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:24,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-22 01:55:24,750 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1028777287, now seen corresponding path program 75 times [2021-05-22 01:55:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:24,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845934124] [2021-05-22 01:55:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:24,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:24,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845934124] [2021-05-22 01:55:24,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845934124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:24,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:24,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562009083] [2021-05-22 01:55:24,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:24,887 INFO L87 Difference]: Start difference. First operand 1470 states and 5863 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:24,957 INFO L93 Difference]: Finished difference Result 2847 states and 10564 transitions. [2021-05-22 01:55:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:24,964 INFO L225 Difference]: With dead ends: 2847 [2021-05-22 01:55:24,964 INFO L226 Difference]: Without dead ends: 2688 [2021-05-22 01:55:24,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-05-22 01:55:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1486. [2021-05-22 01:55:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.9804713804713803) internal successors, (5911), 1485 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5911 transitions. [2021-05-22 01:55:25,009 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5911 transitions. Word has length 25 [2021-05-22 01:55:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:25,009 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5911 transitions. [2021-05-22 01:55:25,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5911 transitions. [2021-05-22 01:55:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:25,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:25,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:25,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-22 01:55:25,012 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:25,012 INFO L82 PathProgramCache]: Analyzing trace with hash -20479303, now seen corresponding path program 76 times [2021-05-22 01:55:25,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:25,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287933440] [2021-05-22 01:55:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:25,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:25,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287933440] [2021-05-22 01:55:25,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287933440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:25,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:25,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905951] [2021-05-22 01:55:25,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:25,129 INFO L87 Difference]: Start difference. First operand 1486 states and 5911 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:25,212 INFO L93 Difference]: Finished difference Result 2875 states and 10652 transitions. [2021-05-22 01:55:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:25,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:25,219 INFO L225 Difference]: With dead ends: 2875 [2021-05-22 01:55:25,219 INFO L226 Difference]: Without dead ends: 2672 [2021-05-22 01:55:25,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-22 01:55:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1470. [2021-05-22 01:55:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.9857045609257997) internal successors, (5855), 1469 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5855 transitions. [2021-05-22 01:55:25,270 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5855 transitions. Word has length 25 [2021-05-22 01:55:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5855 transitions. [2021-05-22 01:55:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5855 transitions. [2021-05-22 01:55:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:25,273 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:25,273 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:25,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-22 01:55:25,273 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash 388384667, now seen corresponding path program 77 times [2021-05-22 01:55:25,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:25,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044390718] [2021-05-22 01:55:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:25,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044390718] [2021-05-22 01:55:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044390718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:25,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:25,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911687439] [2021-05-22 01:55:25,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:25,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:25,377 INFO L87 Difference]: Start difference. First operand 1470 states and 5855 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:25,459 INFO L93 Difference]: Finished difference Result 2921 states and 10833 transitions. [2021-05-22 01:55:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:25,464 INFO L225 Difference]: With dead ends: 2921 [2021-05-22 01:55:25,464 INFO L226 Difference]: Without dead ends: 2732 [2021-05-22 01:55:25,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-05-22 01:55:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1500. [2021-05-22 01:55:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.9679786524349567) internal successors, (5948), 1499 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5948 transitions. [2021-05-22 01:55:25,503 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5948 transitions. Word has length 25 [2021-05-22 01:55:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:25,503 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 5948 transitions. [2021-05-22 01:55:25,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5948 transitions. [2021-05-22 01:55:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:25,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:25,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:25,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-22 01:55:25,506 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1654952327, now seen corresponding path program 78 times [2021-05-22 01:55:25,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:25,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738509804] [2021-05-22 01:55:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:25,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:25,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738509804] [2021-05-22 01:55:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738509804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:25,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:25,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:25,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582289224] [2021-05-22 01:55:25,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:25,616 INFO L87 Difference]: Start difference. First operand 1500 states and 5948 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:25,687 INFO L93 Difference]: Finished difference Result 2919 states and 10798 transitions. [2021-05-22 01:55:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:25,692 INFO L225 Difference]: With dead ends: 2919 [2021-05-22 01:55:25,692 INFO L226 Difference]: Without dead ends: 2694 [2021-05-22 01:55:25,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2021-05-22 01:55:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 1462. [2021-05-22 01:55:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.9911019849418206) internal successors, (5831), 1461 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5831 transitions. [2021-05-22 01:55:25,727 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5831 transitions. Word has length 25 [2021-05-22 01:55:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:25,727 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5831 transitions. [2021-05-22 01:55:25,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5831 transitions. [2021-05-22 01:55:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:25,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:25,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:25,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-22 01:55:25,729 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1704225337, now seen corresponding path program 79 times [2021-05-22 01:55:25,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:25,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974993505] [2021-05-22 01:55:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:25,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:25,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974993505] [2021-05-22 01:55:25,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974993505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:25,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:25,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:25,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180374793] [2021-05-22 01:55:25,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:25,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:25,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:25,824 INFO L87 Difference]: Start difference. First operand 1462 states and 5831 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:25,898 INFO L93 Difference]: Finished difference Result 2843 states and 10554 transitions. [2021-05-22 01:55:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:25,903 INFO L225 Difference]: With dead ends: 2843 [2021-05-22 01:55:25,903 INFO L226 Difference]: Without dead ends: 2684 [2021-05-22 01:55:25,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-05-22 01:55:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1486. [2021-05-22 01:55:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.983164983164983) internal successors, (5915), 1485 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5915 transitions. [2021-05-22 01:55:25,946 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5915 transitions. Word has length 25 [2021-05-22 01:55:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:25,946 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5915 transitions. [2021-05-22 01:55:25,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5915 transitions. [2021-05-22 01:55:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:25,949 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:25,949 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:25,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-22 01:55:25,949 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 114290587, now seen corresponding path program 80 times [2021-05-22 01:55:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:25,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551703625] [2021-05-22 01:55:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:26,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:26,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551703625] [2021-05-22 01:55:26,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551703625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:26,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:26,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:26,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464072619] [2021-05-22 01:55:26,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:26,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:26,049 INFO L87 Difference]: Start difference. First operand 1486 states and 5915 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:26,132 INFO L93 Difference]: Finished difference Result 2873 states and 10647 transitions. [2021-05-22 01:55:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:26,139 INFO L225 Difference]: With dead ends: 2873 [2021-05-22 01:55:26,139 INFO L226 Difference]: Without dead ends: 2668 [2021-05-22 01:55:26,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-05-22 01:55:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1470. [2021-05-22 01:55:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.988427501701838) internal successors, (5859), 1469 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5859 transitions. [2021-05-22 01:55:26,189 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5859 transitions. Word has length 25 [2021-05-22 01:55:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:26,189 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5859 transitions. [2021-05-22 01:55:26,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5859 transitions. [2021-05-22 01:55:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:26,193 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:26,194 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:26,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-22 01:55:26,194 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 15979065, now seen corresponding path program 81 times [2021-05-22 01:55:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:26,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894142334] [2021-05-22 01:55:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:26,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894142334] [2021-05-22 01:55:26,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894142334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:26,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:26,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:26,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066342390] [2021-05-22 01:55:26,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:26,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:26,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:26,293 INFO L87 Difference]: Start difference. First operand 1470 states and 5859 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:26,361 INFO L93 Difference]: Finished difference Result 2837 states and 10529 transitions. [2021-05-22 01:55:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:26,368 INFO L225 Difference]: With dead ends: 2837 [2021-05-22 01:55:26,368 INFO L226 Difference]: Without dead ends: 2678 [2021-05-22 01:55:26,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-05-22 01:55:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 1486. [2021-05-22 01:55:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.977777777777778) internal successors, (5907), 1485 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5907 transitions. [2021-05-22 01:55:26,419 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5907 transitions. Word has length 25 [2021-05-22 01:55:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:26,420 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5907 transitions. [2021-05-22 01:55:26,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5907 transitions. [2021-05-22 01:55:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:26,423 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:26,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:26,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-22 01:55:26,423 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1696475705, now seen corresponding path program 82 times [2021-05-22 01:55:26,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:26,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304397866] [2021-05-22 01:55:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:26,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:26,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304397866] [2021-05-22 01:55:26,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304397866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:26,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:26,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:26,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102890263] [2021-05-22 01:55:26,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:26,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:26,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:26,507 INFO L87 Difference]: Start difference. First operand 1486 states and 5907 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:26,586 INFO L93 Difference]: Finished difference Result 2861 states and 10605 transitions. [2021-05-22 01:55:26,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:26,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:26,592 INFO L225 Difference]: With dead ends: 2861 [2021-05-22 01:55:26,592 INFO L226 Difference]: Without dead ends: 2662 [2021-05-22 01:55:26,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-05-22 01:55:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1470. [2021-05-22 01:55:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.982981620149762) internal successors, (5851), 1469 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5851 transitions. [2021-05-22 01:55:26,627 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5851 transitions. Word has length 25 [2021-05-22 01:55:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:26,627 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5851 transitions. [2021-05-22 01:55:26,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5851 transitions. [2021-05-22 01:55:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:26,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:26,629 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:26,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-22 01:55:26,630 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1433141019, now seen corresponding path program 83 times [2021-05-22 01:55:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:26,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002458722] [2021-05-22 01:55:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:26,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:26,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002458722] [2021-05-22 01:55:26,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002458722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:26,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:26,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593104412] [2021-05-22 01:55:26,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:26,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:26,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:26,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:26,721 INFO L87 Difference]: Start difference. First operand 1470 states and 5851 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:26,789 INFO L93 Difference]: Finished difference Result 2909 states and 10791 transitions. [2021-05-22 01:55:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:26,794 INFO L225 Difference]: With dead ends: 2909 [2021-05-22 01:55:26,794 INFO L226 Difference]: Without dead ends: 2720 [2021-05-22 01:55:26,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-05-22 01:55:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1498. [2021-05-22 01:55:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.967267869071476) internal successors, (5939), 1497 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5939 transitions. [2021-05-22 01:55:26,830 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5939 transitions. Word has length 25 [2021-05-22 01:55:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:26,830 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5939 transitions. [2021-05-22 01:55:26,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5939 transitions. [2021-05-22 01:55:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:26,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:26,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:26,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-22 01:55:26,832 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash 40996473, now seen corresponding path program 84 times [2021-05-22 01:55:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:26,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311372082] [2021-05-22 01:55:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:26,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:26,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311372082] [2021-05-22 01:55:26,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311372082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:26,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:26,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:26,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553547598] [2021-05-22 01:55:26,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:26,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:26,913 INFO L87 Difference]: Start difference. First operand 1498 states and 5939 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:26,976 INFO L93 Difference]: Finished difference Result 2903 states and 10746 transitions. [2021-05-22 01:55:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:26,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:26,982 INFO L225 Difference]: With dead ends: 2903 [2021-05-22 01:55:26,982 INFO L226 Difference]: Without dead ends: 2684 [2021-05-22 01:55:26,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-05-22 01:55:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1462. [2021-05-22 01:55:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.9883641341546885) internal successors, (5827), 1461 states have internal predecessors, (5827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5827 transitions. [2021-05-22 01:55:27,019 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5827 transitions. Word has length 25 [2021-05-22 01:55:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:27,019 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5827 transitions. [2021-05-22 01:55:27,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5827 transitions. [2021-05-22 01:55:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:27,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:27,021 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:27,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-22 01:55:27,021 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2092230299, now seen corresponding path program 85 times [2021-05-22 01:55:27,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:27,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960926803] [2021-05-22 01:55:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:27,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960926803] [2021-05-22 01:55:27,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960926803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:27,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:27,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:27,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562056599] [2021-05-22 01:55:27,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:27,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:27,123 INFO L87 Difference]: Start difference. First operand 1462 states and 5827 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:27,171 INFO L93 Difference]: Finished difference Result 2839 states and 10540 transitions. [2021-05-22 01:55:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:27,177 INFO L225 Difference]: With dead ends: 2839 [2021-05-22 01:55:27,177 INFO L226 Difference]: Without dead ends: 2680 [2021-05-22 01:55:27,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-22 01:55:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1486. [2021-05-22 01:55:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.9804713804713803) internal successors, (5911), 1485 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5911 transitions. [2021-05-22 01:55:27,212 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5911 transitions. Word has length 25 [2021-05-22 01:55:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:27,213 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5911 transitions. [2021-05-22 01:55:27,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5911 transitions. [2021-05-22 01:55:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:27,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:27,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:27,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-22 01:55:27,215 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1194439013, now seen corresponding path program 86 times [2021-05-22 01:55:27,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:27,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847205433] [2021-05-22 01:55:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:27,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:27,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847205433] [2021-05-22 01:55:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847205433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:27,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:27,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000508666] [2021-05-22 01:55:27,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:27,316 INFO L87 Difference]: Start difference. First operand 1486 states and 5911 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:27,376 INFO L93 Difference]: Finished difference Result 2867 states and 10628 transitions. [2021-05-22 01:55:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:27,382 INFO L225 Difference]: With dead ends: 2867 [2021-05-22 01:55:27,382 INFO L226 Difference]: Without dead ends: 2664 [2021-05-22 01:55:27,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-05-22 01:55:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1470. [2021-05-22 01:55:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.9857045609257997) internal successors, (5855), 1469 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5855 transitions. [2021-05-22 01:55:27,416 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5855 transitions. Word has length 25 [2021-05-22 01:55:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:27,417 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5855 transitions. [2021-05-22 01:55:27,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5855 transitions. [2021-05-22 01:55:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:27,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:27,419 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:27,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-22 01:55:27,419 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:27,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1245433337, now seen corresponding path program 87 times [2021-05-22 01:55:27,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:27,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369035601] [2021-05-22 01:55:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:27,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:27,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369035601] [2021-05-22 01:55:27,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369035601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:27,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:27,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918804919] [2021-05-22 01:55:27,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:27,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:27,510 INFO L87 Difference]: Start difference. First operand 1470 states and 5855 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:27,567 INFO L93 Difference]: Finished difference Result 2835 states and 10520 transitions. [2021-05-22 01:55:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:27,574 INFO L225 Difference]: With dead ends: 2835 [2021-05-22 01:55:27,574 INFO L226 Difference]: Without dead ends: 2676 [2021-05-22 01:55:27,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-05-22 01:55:27,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1486. [2021-05-22 01:55:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.975084175084175) internal successors, (5903), 1485 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5903 transitions. [2021-05-22 01:55:27,627 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5903 transitions. Word has length 25 [2021-05-22 01:55:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:27,627 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5903 transitions. [2021-05-22 01:55:27,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5903 transitions. [2021-05-22 01:55:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:27,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:27,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:27,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-22 01:55:27,630 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1215573659, now seen corresponding path program 88 times [2021-05-22 01:55:27,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:27,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705103597] [2021-05-22 01:55:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:27,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:27,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705103597] [2021-05-22 01:55:27,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705103597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:27,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:27,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:27,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46310439] [2021-05-22 01:55:27,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:27,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:27,721 INFO L87 Difference]: Start difference. First operand 1486 states and 5903 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:27,793 INFO L93 Difference]: Finished difference Result 2859 states and 10596 transitions. [2021-05-22 01:55:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:27,798 INFO L225 Difference]: With dead ends: 2859 [2021-05-22 01:55:27,798 INFO L226 Difference]: Without dead ends: 2660 [2021-05-22 01:55:27,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-05-22 01:55:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1470. [2021-05-22 01:55:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.9802586793737236) internal successors, (5847), 1469 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5847 transitions. [2021-05-22 01:55:27,833 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5847 transitions. Word has length 25 [2021-05-22 01:55:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:27,833 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5847 transitions. [2021-05-22 01:55:27,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5847 transitions. [2021-05-22 01:55:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:27,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:27,835 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:27,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-22 01:55:27,835 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1144871269, now seen corresponding path program 89 times [2021-05-22 01:55:27,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:27,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473681113] [2021-05-22 01:55:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:27,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473681113] [2021-05-22 01:55:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473681113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:27,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:27,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:27,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148721136] [2021-05-22 01:55:27,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:27,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:27,938 INFO L87 Difference]: Start difference. First operand 1470 states and 5847 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:28,003 INFO L93 Difference]: Finished difference Result 2903 states and 10772 transitions. [2021-05-22 01:55:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:28,008 INFO L225 Difference]: With dead ends: 2903 [2021-05-22 01:55:28,009 INFO L226 Difference]: Without dead ends: 2716 [2021-05-22 01:55:28,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-05-22 01:55:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 1498. [2021-05-22 01:55:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.9645958583834333) internal successors, (5935), 1497 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5935 transitions. [2021-05-22 01:55:28,043 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5935 transitions. Word has length 25 [2021-05-22 01:55:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:28,043 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5935 transitions. [2021-05-22 01:55:28,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5935 transitions. [2021-05-22 01:55:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:28,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:28,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:28,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-22 01:55:28,046 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759033, now seen corresponding path program 90 times [2021-05-22 01:55:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:28,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101264294] [2021-05-22 01:55:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:28,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:28,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101264294] [2021-05-22 01:55:28,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101264294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:28,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:28,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:28,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757804046] [2021-05-22 01:55:28,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:28,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:28,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:28,137 INFO L87 Difference]: Start difference. First operand 1498 states and 5935 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:28,234 INFO L93 Difference]: Finished difference Result 2899 states and 10732 transitions. [2021-05-22 01:55:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:28,241 INFO L225 Difference]: With dead ends: 2899 [2021-05-22 01:55:28,241 INFO L226 Difference]: Without dead ends: 2680 [2021-05-22 01:55:28,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-22 01:55:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1462. [2021-05-22 01:55:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.9856262833675564) internal successors, (5823), 1461 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5823 transitions. [2021-05-22 01:55:28,290 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5823 transitions. Word has length 25 [2021-05-22 01:55:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:28,291 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5823 transitions. [2021-05-22 01:55:28,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5823 transitions. [2021-05-22 01:55:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:28,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:28,293 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:28,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-22 01:55:28,293 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:28,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:28,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1478632707, now seen corresponding path program 91 times [2021-05-22 01:55:28,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:28,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304346174] [2021-05-22 01:55:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:28,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:28,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304346174] [2021-05-22 01:55:28,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304346174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:28,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:28,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:28,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843931577] [2021-05-22 01:55:28,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:28,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:28,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:28,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:28,397 INFO L87 Difference]: Start difference. First operand 1462 states and 5823 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:28,474 INFO L93 Difference]: Finished difference Result 2975 states and 11062 transitions. [2021-05-22 01:55:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:28,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:28,480 INFO L225 Difference]: With dead ends: 2975 [2021-05-22 01:55:28,480 INFO L226 Difference]: Without dead ends: 2786 [2021-05-22 01:55:28,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-05-22 01:55:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1506. [2021-05-22 01:55:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.9740863787375416) internal successors, (5981), 1505 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5981 transitions. [2021-05-22 01:55:28,516 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5981 transitions. Word has length 25 [2021-05-22 01:55:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:28,516 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5981 transitions. [2021-05-22 01:55:28,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5981 transitions. [2021-05-22 01:55:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:28,518 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:28,518 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:28,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-22 01:55:28,518 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash 772997595, now seen corresponding path program 92 times [2021-05-22 01:55:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:28,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718344533] [2021-05-22 01:55:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:28,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718344533] [2021-05-22 01:55:28,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718344533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:28,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:28,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:28,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264339200] [2021-05-22 01:55:28,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:28,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:28,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:28,616 INFO L87 Difference]: Start difference. First operand 1506 states and 5981 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:28,686 INFO L93 Difference]: Finished difference Result 2973 states and 11027 transitions. [2021-05-22 01:55:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:28,692 INFO L225 Difference]: With dead ends: 2973 [2021-05-22 01:55:28,692 INFO L226 Difference]: Without dead ends: 2756 [2021-05-22 01:55:28,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-05-22 01:55:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1476. [2021-05-22 01:55:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.982372881355932) internal successors, (5874), 1475 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5874 transitions. [2021-05-22 01:55:28,727 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5874 transitions. Word has length 25 [2021-05-22 01:55:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:28,727 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 5874 transitions. [2021-05-22 01:55:28,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5874 transitions. [2021-05-22 01:55:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:28,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:28,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:28,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-22 01:55:28,729 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1969537627, now seen corresponding path program 93 times [2021-05-22 01:55:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:28,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424832601] [2021-05-22 01:55:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:28,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424832601] [2021-05-22 01:55:28,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424832601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:28,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:28,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:28,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307422130] [2021-05-22 01:55:28,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:28,818 INFO L87 Difference]: Start difference. First operand 1476 states and 5874 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:28,886 INFO L93 Difference]: Finished difference Result 2969 states and 11029 transitions. [2021-05-22 01:55:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:28,891 INFO L225 Difference]: With dead ends: 2969 [2021-05-22 01:55:28,891 INFO L226 Difference]: Without dead ends: 2780 [2021-05-22 01:55:28,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-05-22 01:55:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1504. [2021-05-22 01:55:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.9667332002661344) internal successors, (5962), 1503 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5962 transitions. [2021-05-22 01:55:28,926 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5962 transitions. Word has length 25 [2021-05-22 01:55:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:28,926 INFO L482 AbstractCegarLoop]: Abstraction has 1504 states and 5962 transitions. [2021-05-22 01:55:28,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5962 transitions. [2021-05-22 01:55:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:28,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:28,929 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:28,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-22 01:55:28,929 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1132963237, now seen corresponding path program 94 times [2021-05-22 01:55:28,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:28,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575765615] [2021-05-22 01:55:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:29,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:29,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575765615] [2021-05-22 01:55:29,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575765615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:29,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:29,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:29,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355603761] [2021-05-22 01:55:29,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:29,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:29,022 INFO L87 Difference]: Start difference. First operand 1504 states and 5962 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:29,093 INFO L93 Difference]: Finished difference Result 2963 states and 10984 transitions. [2021-05-22 01:55:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:29,099 INFO L225 Difference]: With dead ends: 2963 [2021-05-22 01:55:29,099 INFO L226 Difference]: Without dead ends: 2752 [2021-05-22 01:55:29,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-05-22 01:55:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1476. [2021-05-22 01:55:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.9728813559322034) internal successors, (5860), 1475 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5860 transitions. [2021-05-22 01:55:29,137 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5860 transitions. Word has length 25 [2021-05-22 01:55:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:29,137 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 5860 transitions. [2021-05-22 01:55:29,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5860 transitions. [2021-05-22 01:55:29,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:29,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:29,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:29,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-22 01:55:29,139 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:29,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1343082055, now seen corresponding path program 95 times [2021-05-22 01:55:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:29,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123285438] [2021-05-22 01:55:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:29,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123285438] [2021-05-22 01:55:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123285438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:29,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:29,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068427120] [2021-05-22 01:55:29,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:29,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:29,227 INFO L87 Difference]: Start difference. First operand 1476 states and 5860 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:29,288 INFO L93 Difference]: Finished difference Result 2965 states and 11005 transitions. [2021-05-22 01:55:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:29,294 INFO L225 Difference]: With dead ends: 2965 [2021-05-22 01:55:29,294 INFO L226 Difference]: Without dead ends: 2778 [2021-05-22 01:55:29,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-05-22 01:55:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 1504. [2021-05-22 01:55:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.9574184963406522) internal successors, (5948), 1503 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5948 transitions. [2021-05-22 01:55:29,329 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5948 transitions. Word has length 25 [2021-05-22 01:55:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:29,329 INFO L482 AbstractCegarLoop]: Abstraction has 1504 states and 5948 transitions. [2021-05-22 01:55:29,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5948 transitions. [2021-05-22 01:55:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:29,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:29,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:29,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-22 01:55:29,331 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash -262019429, now seen corresponding path program 96 times [2021-05-22 01:55:29,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:29,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557914511] [2021-05-22 01:55:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:29,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557914511] [2021-05-22 01:55:29,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557914511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:29,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:29,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:29,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140397834] [2021-05-22 01:55:29,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:29,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:29,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:29,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:29,413 INFO L87 Difference]: Start difference. First operand 1504 states and 5948 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:29,477 INFO L93 Difference]: Finished difference Result 2961 states and 10965 transitions. [2021-05-22 01:55:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:29,483 INFO L225 Difference]: With dead ends: 2961 [2021-05-22 01:55:29,483 INFO L226 Difference]: Without dead ends: 2732 [2021-05-22 01:55:29,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-05-22 01:55:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1458. [2021-05-22 01:55:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.9897048730267675) internal successors, (5813), 1457 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5813 transitions. [2021-05-22 01:55:29,518 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5813 transitions. Word has length 25 [2021-05-22 01:55:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5813 transitions. [2021-05-22 01:55:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5813 transitions. [2021-05-22 01:55:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:29,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:29,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:29,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-22 01:55:29,520 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:29,520 INFO L82 PathProgramCache]: Analyzing trace with hash 847937503, now seen corresponding path program 97 times [2021-05-22 01:55:29,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:29,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972124882] [2021-05-22 01:55:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:29,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972124882] [2021-05-22 01:55:29,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972124882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:29,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:29,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759146390] [2021-05-22 01:55:29,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:29,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:29,617 INFO L87 Difference]: Start difference. First operand 1458 states and 5813 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:29,679 INFO L93 Difference]: Finished difference Result 3229 states and 12055 transitions. [2021-05-22 01:55:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:29,685 INFO L225 Difference]: With dead ends: 3229 [2021-05-22 01:55:29,685 INFO L226 Difference]: Without dead ends: 3040 [2021-05-22 01:55:29,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-05-22 01:55:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 1525. [2021-05-22 01:55:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.9783464566929134) internal successors, (6063), 1524 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 6063 transitions. [2021-05-22 01:55:29,722 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 6063 transitions. Word has length 25 [2021-05-22 01:55:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:29,722 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 6063 transitions. [2021-05-22 01:55:29,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 6063 transitions. [2021-05-22 01:55:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:29,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:29,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:29,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-22 01:55:29,724 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:29,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1195399491, now seen corresponding path program 98 times [2021-05-22 01:55:29,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:29,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122168981] [2021-05-22 01:55:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:29,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:29,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122168981] [2021-05-22 01:55:29,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122168981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:29,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:29,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672942175] [2021-05-22 01:55:29,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:29,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:29,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:29,837 INFO L87 Difference]: Start difference. First operand 1525 states and 6063 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:29,911 INFO L93 Difference]: Finished difference Result 3227 states and 12020 transitions. [2021-05-22 01:55:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:29,919 INFO L225 Difference]: With dead ends: 3227 [2021-05-22 01:55:29,919 INFO L226 Difference]: Without dead ends: 3010 [2021-05-22 01:55:29,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-05-22 01:55:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1495. [2021-05-22 01:55:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.9866131191432395) internal successors, (5956), 1494 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5956 transitions. [2021-05-22 01:55:29,973 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5956 transitions. Word has length 25 [2021-05-22 01:55:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:29,974 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 5956 transitions. [2021-05-22 01:55:29,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5956 transitions. [2021-05-22 01:55:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:29,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:29,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:29,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-22 01:55:29,977 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1140541, now seen corresponding path program 99 times [2021-05-22 01:55:29,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:29,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067849610] [2021-05-22 01:55:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:30,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:30,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067849610] [2021-05-22 01:55:30,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067849610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:30,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:30,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239763688] [2021-05-22 01:55:30,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:30,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:30,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:30,075 INFO L87 Difference]: Start difference. First operand 1495 states and 5956 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:30,137 INFO L93 Difference]: Finished difference Result 3223 states and 12022 transitions. [2021-05-22 01:55:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:30,143 INFO L225 Difference]: With dead ends: 3223 [2021-05-22 01:55:30,144 INFO L226 Difference]: Without dead ends: 3034 [2021-05-22 01:55:30,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-05-22 01:55:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1523. [2021-05-22 01:55:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.971090670170828) internal successors, (6044), 1522 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 6044 transitions. [2021-05-22 01:55:30,182 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 6044 transitions. Word has length 25 [2021-05-22 01:55:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:30,182 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 6044 transitions. [2021-05-22 01:55:30,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 6044 transitions. [2021-05-22 01:55:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:30,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:30,184 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:30,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-22 01:55:30,185 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1193606973, now seen corresponding path program 100 times [2021-05-22 01:55:30,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:30,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972362266] [2021-05-22 01:55:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:30,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:30,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972362266] [2021-05-22 01:55:30,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972362266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:30,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:30,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:30,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258322003] [2021-05-22 01:55:30,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:30,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:30,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:30,269 INFO L87 Difference]: Start difference. First operand 1523 states and 6044 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:30,338 INFO L93 Difference]: Finished difference Result 3217 states and 11977 transitions. [2021-05-22 01:55:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:30,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:30,344 INFO L225 Difference]: With dead ends: 3217 [2021-05-22 01:55:30,344 INFO L226 Difference]: Without dead ends: 3006 [2021-05-22 01:55:30,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-05-22 01:55:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1495. [2021-05-22 01:55:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.9772423025435075) internal successors, (5942), 1494 states have internal predecessors, (5942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5942 transitions. [2021-05-22 01:55:30,382 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5942 transitions. Word has length 25 [2021-05-22 01:55:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:30,382 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 5942 transitions. [2021-05-22 01:55:30,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5942 transitions. [2021-05-22 01:55:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:30,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:30,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:30,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-22 01:55:30,385 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 983488155, now seen corresponding path program 101 times [2021-05-22 01:55:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:30,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592359381] [2021-05-22 01:55:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592359381] [2021-05-22 01:55:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592359381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:30,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:30,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:30,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471095134] [2021-05-22 01:55:30,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:30,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:30,476 INFO L87 Difference]: Start difference. First operand 1495 states and 5942 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:30,536 INFO L93 Difference]: Finished difference Result 3219 states and 11998 transitions. [2021-05-22 01:55:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:30,542 INFO L225 Difference]: With dead ends: 3219 [2021-05-22 01:55:30,542 INFO L226 Difference]: Without dead ends: 3032 [2021-05-22 01:55:30,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-05-22 01:55:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 1523. [2021-05-22 01:55:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.961892247043364) internal successors, (6030), 1522 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 6030 transitions. [2021-05-22 01:55:30,580 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 6030 transitions. Word has length 25 [2021-05-22 01:55:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:30,580 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 6030 transitions. [2021-05-22 01:55:30,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 6030 transitions. [2021-05-22 01:55:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:30,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:30,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:30,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-22 01:55:30,582 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2064550781, now seen corresponding path program 102 times [2021-05-22 01:55:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:30,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132027734] [2021-05-22 01:55:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:30,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132027734] [2021-05-22 01:55:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132027734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:30,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:30,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696856279] [2021-05-22 01:55:30,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:30,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:30,663 INFO L87 Difference]: Start difference. First operand 1523 states and 6030 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:30,739 INFO L93 Difference]: Finished difference Result 3215 states and 11958 transitions. [2021-05-22 01:55:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:30,746 INFO L225 Difference]: With dead ends: 3215 [2021-05-22 01:55:30,747 INFO L226 Difference]: Without dead ends: 2990 [2021-05-22 01:55:30,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-05-22 01:55:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 1481. [2021-05-22 01:55:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.985135135135135) internal successors, (5898), 1480 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5898 transitions. [2021-05-22 01:55:30,785 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5898 transitions. Word has length 25 [2021-05-22 01:55:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:30,785 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5898 transitions. [2021-05-22 01:55:30,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5898 transitions. [2021-05-22 01:55:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:30,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:30,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:30,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-22 01:55:30,787 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:30,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1125368515, now seen corresponding path program 103 times [2021-05-22 01:55:30,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:30,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079795609] [2021-05-22 01:55:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:30,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:30,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079795609] [2021-05-22 01:55:30,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079795609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:30,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:30,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:30,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409650278] [2021-05-22 01:55:30,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:30,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:30,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:30,872 INFO L87 Difference]: Start difference. First operand 1481 states and 5898 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:30,936 INFO L93 Difference]: Finished difference Result 3346 states and 12460 transitions. [2021-05-22 01:55:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:30,942 INFO L225 Difference]: With dead ends: 3346 [2021-05-22 01:55:30,942 INFO L226 Difference]: Without dead ends: 3157 [2021-05-22 01:55:30,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-05-22 01:55:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 1550. [2021-05-22 01:55:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.9664299548095547) internal successors, (6144), 1549 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6144 transitions. [2021-05-22 01:55:30,982 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6144 transitions. Word has length 25 [2021-05-22 01:55:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 6144 transitions. [2021-05-22 01:55:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6144 transitions. [2021-05-22 01:55:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:30,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:30,985 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:30,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-22 01:55:30,985 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1126261787, now seen corresponding path program 104 times [2021-05-22 01:55:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:30,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016334514] [2021-05-22 01:55:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:31,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:31,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016334514] [2021-05-22 01:55:31,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016334514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:31,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:31,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:31,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119937661] [2021-05-22 01:55:31,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:31,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:31,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:31,065 INFO L87 Difference]: Start difference. First operand 1550 states and 6144 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:31,135 INFO L93 Difference]: Finished difference Result 3344 states and 12425 transitions. [2021-05-22 01:55:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:31,142 INFO L225 Difference]: With dead ends: 3344 [2021-05-22 01:55:31,142 INFO L226 Difference]: Without dead ends: 3127 [2021-05-22 01:55:31,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2021-05-22 01:55:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 1520. [2021-05-22 01:55:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.9736668861092825) internal successors, (6036), 1519 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 6036 transitions. [2021-05-22 01:55:31,180 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 6036 transitions. Word has length 25 [2021-05-22 01:55:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:31,180 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 6036 transitions. [2021-05-22 01:55:31,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 6036 transitions. [2021-05-22 01:55:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:31,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:31,182 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:31,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-22 01:55:31,182 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:31,182 INFO L82 PathProgramCache]: Analyzing trace with hash -699628227, now seen corresponding path program 105 times [2021-05-22 01:55:31,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:31,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58002862] [2021-05-22 01:55:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:31,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:31,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58002862] [2021-05-22 01:55:31,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58002862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:31,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:31,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711848114] [2021-05-22 01:55:31,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:31,270 INFO L87 Difference]: Start difference. First operand 1520 states and 6036 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:31,361 INFO L93 Difference]: Finished difference Result 3414 states and 12679 transitions. [2021-05-22 01:55:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:31,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:31,368 INFO L225 Difference]: With dead ends: 3414 [2021-05-22 01:55:31,368 INFO L226 Difference]: Without dead ends: 3225 [2021-05-22 01:55:31,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-05-22 01:55:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 1583. [2021-05-22 01:55:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.946270543615676) internal successors, (6243), 1582 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 6243 transitions. [2021-05-22 01:55:31,412 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 6243 transitions. Word has length 25 [2021-05-22 01:55:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:31,412 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 6243 transitions. [2021-05-22 01:55:31,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 6243 transitions. [2021-05-22 01:55:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:31,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:31,414 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:31,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-22 01:55:31,414 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1255416515, now seen corresponding path program 106 times [2021-05-22 01:55:31,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:31,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404557584] [2021-05-22 01:55:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:31,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:31,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404557584] [2021-05-22 01:55:31,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404557584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:31,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:31,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:31,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961090636] [2021-05-22 01:55:31,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:31,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:31,501 INFO L87 Difference]: Start difference. First operand 1583 states and 6243 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:31,557 INFO L93 Difference]: Finished difference Result 3447 states and 12762 transitions. [2021-05-22 01:55:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:31,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:31,564 INFO L225 Difference]: With dead ends: 3447 [2021-05-22 01:55:31,564 INFO L226 Difference]: Without dead ends: 3162 [2021-05-22 01:55:31,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-05-22 01:55:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 1520. [2021-05-22 01:55:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.953258722843976) internal successors, (6005), 1519 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 6005 transitions. [2021-05-22 01:55:31,609 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 6005 transitions. Word has length 25 [2021-05-22 01:55:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:31,609 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 6005 transitions. [2021-05-22 01:55:31,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 6005 transitions. [2021-05-22 01:55:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:31,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:31,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:31,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-22 01:55:31,611 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash 282719387, now seen corresponding path program 107 times [2021-05-22 01:55:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:31,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930069733] [2021-05-22 01:55:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:31,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:31,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930069733] [2021-05-22 01:55:31,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930069733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:31,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:31,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:31,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090775921] [2021-05-22 01:55:31,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:31,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:31,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:31,704 INFO L87 Difference]: Start difference. First operand 1520 states and 6005 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:31,769 INFO L93 Difference]: Finished difference Result 3393 states and 12587 transitions. [2021-05-22 01:55:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:31,776 INFO L225 Difference]: With dead ends: 3393 [2021-05-22 01:55:31,776 INFO L226 Difference]: Without dead ends: 3206 [2021-05-22 01:55:31,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-05-22 01:55:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 1566. [2021-05-22 01:55:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.9373801916932907) internal successors, (6162), 1565 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 6162 transitions. [2021-05-22 01:55:31,822 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 6162 transitions. Word has length 25 [2021-05-22 01:55:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:31,822 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 6162 transitions. [2021-05-22 01:55:31,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 6162 transitions. [2021-05-22 01:55:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:31,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:31,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:31,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-22 01:55:31,824 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2074670211, now seen corresponding path program 108 times [2021-05-22 01:55:31,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:31,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645460716] [2021-05-22 01:55:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:31,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:31,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645460716] [2021-05-22 01:55:31,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645460716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:31,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:31,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:31,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160577203] [2021-05-22 01:55:31,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:31,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:31,904 INFO L87 Difference]: Start difference. First operand 1566 states and 6162 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:31,967 INFO L93 Difference]: Finished difference Result 3428 states and 12676 transitions. [2021-05-22 01:55:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:31,973 INFO L225 Difference]: With dead ends: 3428 [2021-05-22 01:55:31,973 INFO L226 Difference]: Without dead ends: 3121 [2021-05-22 01:55:31,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-05-22 01:55:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 1481. [2021-05-22 01:55:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.972297297297297) internal successors, (5879), 1480 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5879 transitions. [2021-05-22 01:55:32,010 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5879 transitions. Word has length 25 [2021-05-22 01:55:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:32,010 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5879 transitions. [2021-05-22 01:55:32,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5879 transitions. [2021-05-22 01:55:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:32,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:32,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:32,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-22 01:55:32,013 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1982116581, now seen corresponding path program 109 times [2021-05-22 01:55:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:32,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913358440] [2021-05-22 01:55:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:32,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:32,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913358440] [2021-05-22 01:55:32,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913358440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:32,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:32,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:32,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856581336] [2021-05-22 01:55:32,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:32,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:32,106 INFO L87 Difference]: Start difference. First operand 1481 states and 5879 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:32,172 INFO L93 Difference]: Finished difference Result 3323 states and 12372 transitions. [2021-05-22 01:55:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:32,181 INFO L225 Difference]: With dead ends: 3323 [2021-05-22 01:55:32,181 INFO L226 Difference]: Without dead ends: 3134 [2021-05-22 01:55:32,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-05-22 01:55:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1539. [2021-05-22 01:55:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.963589076723017) internal successors, (6096), 1538 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 6096 transitions. [2021-05-22 01:55:32,220 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 6096 transitions. Word has length 25 [2021-05-22 01:55:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:32,220 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 6096 transitions. [2021-05-22 01:55:32,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 6096 transitions. [2021-05-22 01:55:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:32,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:32,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:32,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-22 01:55:32,223 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash -789650149, now seen corresponding path program 110 times [2021-05-22 01:55:32,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:32,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038007514] [2021-05-22 01:55:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:32,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:32,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038007514] [2021-05-22 01:55:32,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038007514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:32,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:32,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:32,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316725930] [2021-05-22 01:55:32,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:32,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:32,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:32,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:32,301 INFO L87 Difference]: Start difference. First operand 1539 states and 6096 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:32,370 INFO L93 Difference]: Finished difference Result 3317 states and 12327 transitions. [2021-05-22 01:55:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:32,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:32,377 INFO L225 Difference]: With dead ends: 3317 [2021-05-22 01:55:32,377 INFO L226 Difference]: Without dead ends: 3106 [2021-05-22 01:55:32,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-05-22 01:55:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 1511. [2021-05-22 01:55:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.9695364238410598) internal successors, (5994), 1510 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5994 transitions. [2021-05-22 01:55:32,416 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5994 transitions. Word has length 25 [2021-05-22 01:55:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:32,416 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5994 transitions. [2021-05-22 01:55:32,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5994 transitions. [2021-05-22 01:55:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:32,418 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:32,418 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:32,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-22 01:55:32,418 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1002269693, now seen corresponding path program 111 times [2021-05-22 01:55:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:32,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470874847] [2021-05-22 01:55:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:32,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:32,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470874847] [2021-05-22 01:55:32,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470874847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:32,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:32,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:32,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4967607] [2021-05-22 01:55:32,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:32,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:32,500 INFO L87 Difference]: Start difference. First operand 1511 states and 5994 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:32,562 INFO L93 Difference]: Finished difference Result 3397 states and 12611 transitions. [2021-05-22 01:55:32,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:32,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:32,568 INFO L225 Difference]: With dead ends: 3397 [2021-05-22 01:55:32,568 INFO L226 Difference]: Without dead ends: 3208 [2021-05-22 01:55:32,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-05-22 01:55:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 1574. [2021-05-22 01:55:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.9421487603305785) internal successors, (6201), 1573 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 6201 transitions. [2021-05-22 01:55:32,607 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 6201 transitions. Word has length 25 [2021-05-22 01:55:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:32,607 INFO L482 AbstractCegarLoop]: Abstraction has 1574 states and 6201 transitions. [2021-05-22 01:55:32,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 6201 transitions. [2021-05-22 01:55:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:32,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:32,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:32,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-22 01:55:32,610 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1016489243, now seen corresponding path program 112 times [2021-05-22 01:55:32,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:32,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537977175] [2021-05-22 01:55:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:32,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:32,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537977175] [2021-05-22 01:55:32,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537977175] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:32,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:32,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488150006] [2021-05-22 01:55:32,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:32,697 INFO L87 Difference]: Start difference. First operand 1574 states and 6201 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:32,775 INFO L93 Difference]: Finished difference Result 3430 states and 12694 transitions. [2021-05-22 01:55:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:32,782 INFO L225 Difference]: With dead ends: 3430 [2021-05-22 01:55:32,782 INFO L226 Difference]: Without dead ends: 3145 [2021-05-22 01:55:32,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-05-22 01:55:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 1511. [2021-05-22 01:55:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.9496688741721853) internal successors, (5964), 1510 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5964 transitions. [2021-05-22 01:55:32,822 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5964 transitions. Word has length 25 [2021-05-22 01:55:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:32,822 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5964 transitions. [2021-05-22 01:55:32,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5964 transitions. [2021-05-22 01:55:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:32,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:32,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:32,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-22 01:55:32,824 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:32,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1968717083, now seen corresponding path program 113 times [2021-05-22 01:55:32,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:32,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659670814] [2021-05-22 01:55:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:32,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659670814] [2021-05-22 01:55:32,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659670814] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:32,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:32,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:32,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292742974] [2021-05-22 01:55:32,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:32,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:32,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:32,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:32,920 INFO L87 Difference]: Start difference. First operand 1511 states and 5964 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:32,997 INFO L93 Difference]: Finished difference Result 3366 states and 12489 transitions. [2021-05-22 01:55:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:33,003 INFO L225 Difference]: With dead ends: 3366 [2021-05-22 01:55:33,003 INFO L226 Difference]: Without dead ends: 3183 [2021-05-22 01:55:33,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2021-05-22 01:55:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 1555. [2021-05-22 01:55:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.9356499356499355) internal successors, (6116), 1554 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 6116 transitions. [2021-05-22 01:55:33,042 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 6116 transitions. Word has length 25 [2021-05-22 01:55:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:33,043 INFO L482 AbstractCegarLoop]: Abstraction has 1555 states and 6116 transitions. [2021-05-22 01:55:33,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 6116 transitions. [2021-05-22 01:55:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:33,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:33,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:33,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-22 01:55:33,046 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash 899198077, now seen corresponding path program 114 times [2021-05-22 01:55:33,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:33,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294641646] [2021-05-22 01:55:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:33,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:33,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294641646] [2021-05-22 01:55:33,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294641646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:33,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:33,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:33,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583370156] [2021-05-22 01:55:33,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:33,158 INFO L87 Difference]: Start difference. First operand 1555 states and 6116 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:33,239 INFO L93 Difference]: Finished difference Result 3405 states and 12592 transitions. [2021-05-22 01:55:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:33,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:33,248 INFO L225 Difference]: With dead ends: 3405 [2021-05-22 01:55:33,248 INFO L226 Difference]: Without dead ends: 3109 [2021-05-22 01:55:33,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-05-22 01:55:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1481. [2021-05-22 01:55:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.962162162162162) internal successors, (5864), 1480 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5864 transitions. [2021-05-22 01:55:33,285 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5864 transitions. Word has length 25 [2021-05-22 01:55:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:33,285 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5864 transitions. [2021-05-22 01:55:33,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5864 transitions. [2021-05-22 01:55:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:33,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:33,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:33,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-22 01:55:33,287 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1009720071, now seen corresponding path program 115 times [2021-05-22 01:55:33,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:33,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063526644] [2021-05-22 01:55:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:33,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:33,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063526644] [2021-05-22 01:55:33,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063526644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:33,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:33,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:33,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150318827] [2021-05-22 01:55:33,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:33,366 INFO L87 Difference]: Start difference. First operand 1481 states and 5864 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:33,442 INFO L93 Difference]: Finished difference Result 3292 states and 12263 transitions. [2021-05-22 01:55:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:33,448 INFO L225 Difference]: With dead ends: 3292 [2021-05-22 01:55:33,449 INFO L226 Difference]: Without dead ends: 3105 [2021-05-22 01:55:33,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-05-22 01:55:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1531. [2021-05-22 01:55:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.9562091503267975) internal successors, (6053), 1530 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6053 transitions. [2021-05-22 01:55:33,491 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6053 transitions. Word has length 25 [2021-05-22 01:55:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:33,491 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 6053 transitions. [2021-05-22 01:55:33,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6053 transitions. [2021-05-22 01:55:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:33,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:33,494 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:33,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-22 01:55:33,494 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash 71342555, now seen corresponding path program 116 times [2021-05-22 01:55:33,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:33,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452440591] [2021-05-22 01:55:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:33,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:33,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452440591] [2021-05-22 01:55:33,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452440591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:33,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:33,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:33,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053568164] [2021-05-22 01:55:33,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:33,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:33,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:33,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:33,585 INFO L87 Difference]: Start difference. First operand 1531 states and 6053 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:33,652 INFO L93 Difference]: Finished difference Result 3288 states and 12223 transitions. [2021-05-22 01:55:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:33,659 INFO L225 Difference]: With dead ends: 3288 [2021-05-22 01:55:33,659 INFO L226 Difference]: Without dead ends: 3077 [2021-05-22 01:55:33,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-05-22 01:55:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 1503. [2021-05-22 01:55:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.9620505992010653) internal successors, (5951), 1502 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5951 transitions. [2021-05-22 01:55:33,695 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5951 transitions. Word has length 25 [2021-05-22 01:55:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:33,695 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 5951 transitions. [2021-05-22 01:55:33,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5951 transitions. [2021-05-22 01:55:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:33,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:33,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:33,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-22 01:55:33,697 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:33,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1974666203, now seen corresponding path program 117 times [2021-05-22 01:55:33,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:33,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684348100] [2021-05-22 01:55:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:33,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:33,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684348100] [2021-05-22 01:55:33,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684348100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:33,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:33,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:33,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098682033] [2021-05-22 01:55:33,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:33,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:33,778 INFO L87 Difference]: Start difference. First operand 1503 states and 5951 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:33,847 INFO L93 Difference]: Finished difference Result 3349 states and 12451 transitions. [2021-05-22 01:55:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:33,853 INFO L225 Difference]: With dead ends: 3349 [2021-05-22 01:55:33,853 INFO L226 Difference]: Without dead ends: 3162 [2021-05-22 01:55:33,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-05-22 01:55:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 1549. [2021-05-22 01:55:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.945736434108527) internal successors, (6108), 1548 states have internal predecessors, (6108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 6108 transitions. [2021-05-22 01:55:33,892 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 6108 transitions. Word has length 25 [2021-05-22 01:55:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:33,892 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 6108 transitions. [2021-05-22 01:55:33,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 6108 transitions. [2021-05-22 01:55:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:33,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:33,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:33,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-22 01:55:33,894 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash 187284443, now seen corresponding path program 118 times [2021-05-22 01:55:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:33,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086644] [2021-05-22 01:55:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:33,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086644] [2021-05-22 01:55:33,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:33,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:33,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:33,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901641728] [2021-05-22 01:55:33,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:33,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:33,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:33,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:33,987 INFO L87 Difference]: Start difference. First operand 1549 states and 6108 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:34,052 INFO L93 Difference]: Finished difference Result 3384 states and 12540 transitions. [2021-05-22 01:55:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:34,058 INFO L225 Difference]: With dead ends: 3384 [2021-05-22 01:55:34,058 INFO L226 Difference]: Without dead ends: 3116 [2021-05-22 01:55:34,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-05-22 01:55:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1503. [2021-05-22 01:55:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.947403462050599) internal successors, (5929), 1502 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5929 transitions. [2021-05-22 01:55:34,097 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5929 transitions. Word has length 25 [2021-05-22 01:55:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:34,097 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 5929 transitions. [2021-05-22 01:55:34,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5929 transitions. [2021-05-22 01:55:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:34,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:34,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:34,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-22 01:55:34,099 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:34,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1932296131, now seen corresponding path program 119 times [2021-05-22 01:55:34,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:34,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587537156] [2021-05-22 01:55:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:34,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:34,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587537156] [2021-05-22 01:55:34,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587537156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:34,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:34,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733510727] [2021-05-22 01:55:34,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:34,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:34,186 INFO L87 Difference]: Start difference. First operand 1503 states and 5929 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:34,250 INFO L93 Difference]: Finished difference Result 3339 states and 12398 transitions. [2021-05-22 01:55:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:34,256 INFO L225 Difference]: With dead ends: 3339 [2021-05-22 01:55:34,257 INFO L226 Difference]: Without dead ends: 3156 [2021-05-22 01:55:34,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-05-22 01:55:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 1547. [2021-05-22 01:55:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 3.9333764553686934) internal successors, (6081), 1546 states have internal predecessors, (6081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 6081 transitions. [2021-05-22 01:55:34,294 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 6081 transitions. Word has length 25 [2021-05-22 01:55:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:34,294 INFO L482 AbstractCegarLoop]: Abstraction has 1547 states and 6081 transitions. [2021-05-22 01:55:34,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 6081 transitions. [2021-05-22 01:55:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:34,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:34,296 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:34,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-22 01:55:34,296 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:34,297 INFO L82 PathProgramCache]: Analyzing trace with hash -727646949, now seen corresponding path program 120 times [2021-05-22 01:55:34,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:34,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423207875] [2021-05-22 01:55:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:34,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423207875] [2021-05-22 01:55:34,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423207875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:34,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:34,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:34,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383692034] [2021-05-22 01:55:34,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:34,398 INFO L87 Difference]: Start difference. First operand 1547 states and 6081 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:34,465 INFO L93 Difference]: Finished difference Result 3378 states and 12501 transitions. [2021-05-22 01:55:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:34,471 INFO L225 Difference]: With dead ends: 3378 [2021-05-22 01:55:34,471 INFO L226 Difference]: Without dead ends: 3057 [2021-05-22 01:55:34,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2021-05-22 01:55:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 1448. [2021-05-22 01:55:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9979267449896336) internal successors, (5785), 1447 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5785 transitions. [2021-05-22 01:55:34,513 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5785 transitions. Word has length 25 [2021-05-22 01:55:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:34,513 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5785 transitions. [2021-05-22 01:55:34,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5785 transitions. [2021-05-22 01:55:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:34,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:34,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:34,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-22 01:55:34,516 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:34,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1096271389, now seen corresponding path program 121 times [2021-05-22 01:55:34,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:34,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825503081] [2021-05-22 01:55:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:34,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:34,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825503081] [2021-05-22 01:55:34,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825503081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:34,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:34,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005893501] [2021-05-22 01:55:34,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:34,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:34,626 INFO L87 Difference]: Start difference. First operand 1448 states and 5785 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:34,689 INFO L93 Difference]: Finished difference Result 3141 states and 11643 transitions. [2021-05-22 01:55:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:34,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:34,694 INFO L225 Difference]: With dead ends: 3141 [2021-05-22 01:55:34,694 INFO L226 Difference]: Without dead ends: 2982 [2021-05-22 01:55:34,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-05-22 01:55:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1504. [2021-05-22 01:55:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.9900199600798403) internal successors, (5997), 1503 states have internal predecessors, (5997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5997 transitions. [2021-05-22 01:55:34,731 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5997 transitions. Word has length 25 [2021-05-22 01:55:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:34,731 INFO L482 AbstractCegarLoop]: Abstraction has 1504 states and 5997 transitions. [2021-05-22 01:55:34,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5997 transitions. [2021-05-22 01:55:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:34,733 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:34,734 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:34,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-22 01:55:34,734 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash 87973405, now seen corresponding path program 122 times [2021-05-22 01:55:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:34,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586668459] [2021-05-22 01:55:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:34,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:34,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586668459] [2021-05-22 01:55:34,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586668459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:34,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:34,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:34,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002104681] [2021-05-22 01:55:34,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:34,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:34,853 INFO L87 Difference]: Start difference. First operand 1504 states and 5997 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:34,904 INFO L93 Difference]: Finished difference Result 3204 states and 11850 transitions. [2021-05-22 01:55:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:34,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:34,910 INFO L225 Difference]: With dead ends: 3204 [2021-05-22 01:55:34,910 INFO L226 Difference]: Without dead ends: 2950 [2021-05-22 01:55:34,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-05-22 01:55:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 1472. [2021-05-22 01:55:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.989802855200544) internal successors, (5869), 1471 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5869 transitions. [2021-05-22 01:55:34,947 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5869 transitions. Word has length 25 [2021-05-22 01:55:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:34,947 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5869 transitions. [2021-05-22 01:55:34,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5869 transitions. [2021-05-22 01:55:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:34,949 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:34,949 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:34,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-22 01:55:34,950 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1134886073, now seen corresponding path program 123 times [2021-05-22 01:55:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:34,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894791680] [2021-05-22 01:55:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:35,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:35,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894791680] [2021-05-22 01:55:35,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894791680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:35,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:35,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:35,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348840237] [2021-05-22 01:55:35,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:35,090 INFO L87 Difference]: Start difference. First operand 1472 states and 5869 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:35,156 INFO L93 Difference]: Finished difference Result 3092 states and 11449 transitions. [2021-05-22 01:55:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:35,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:35,164 INFO L225 Difference]: With dead ends: 3092 [2021-05-22 01:55:35,164 INFO L226 Difference]: Without dead ends: 2933 [2021-05-22 01:55:35,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-05-22 01:55:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1488. [2021-05-22 01:55:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.9791526563550774) internal successors, (5917), 1487 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5917 transitions. [2021-05-22 01:55:35,222 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5917 transitions. Word has length 25 [2021-05-22 01:55:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:35,222 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 5917 transitions. [2021-05-22 01:55:35,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5917 transitions. [2021-05-22 01:55:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:35,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:35,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:35,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-22 01:55:35,227 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash -455048677, now seen corresponding path program 124 times [2021-05-22 01:55:35,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:35,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297979537] [2021-05-22 01:55:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:35,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:35,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297979537] [2021-05-22 01:55:35,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297979537] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:35,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:35,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:35,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579977391] [2021-05-22 01:55:35,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:35,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:35,332 INFO L87 Difference]: Start difference. First operand 1488 states and 5917 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:35,397 INFO L93 Difference]: Finished difference Result 3122 states and 11542 transitions. [2021-05-22 01:55:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:35,402 INFO L225 Difference]: With dead ends: 3122 [2021-05-22 01:55:35,403 INFO L226 Difference]: Without dead ends: 2917 [2021-05-22 01:55:35,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-05-22 01:55:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1472. [2021-05-22 01:55:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9843643779741673) internal successors, (5861), 1471 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5861 transitions. [2021-05-22 01:55:35,440 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5861 transitions. Word has length 25 [2021-05-22 01:55:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:35,441 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5861 transitions. [2021-05-22 01:55:35,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5861 transitions. [2021-05-22 01:55:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:35,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:35,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:35,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-22 01:55:35,443 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1093212163, now seen corresponding path program 125 times [2021-05-22 01:55:35,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:35,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337615016] [2021-05-22 01:55:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:35,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337615016] [2021-05-22 01:55:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337615016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:35,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:35,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:35,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405936838] [2021-05-22 01:55:35,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:35,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:35,530 INFO L87 Difference]: Start difference. First operand 1472 states and 5861 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:35,592 INFO L93 Difference]: Finished difference Result 3232 states and 11947 transitions. [2021-05-22 01:55:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:35,598 INFO L225 Difference]: With dead ends: 3232 [2021-05-22 01:55:35,598 INFO L226 Difference]: Without dead ends: 3043 [2021-05-22 01:55:35,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2021-05-22 01:55:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 1535. [2021-05-22 01:55:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.955671447196871) internal successors, (6068), 1534 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6068 transitions. [2021-05-22 01:55:35,636 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6068 transitions. Word has length 25 [2021-05-22 01:55:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:35,636 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6068 transitions. [2021-05-22 01:55:35,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6068 transitions. [2021-05-22 01:55:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:35,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:35,638 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:35,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-22 01:55:35,638 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:35,638 INFO L82 PathProgramCache]: Analyzing trace with hash -795159205, now seen corresponding path program 126 times [2021-05-22 01:55:35,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:35,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224944714] [2021-05-22 01:55:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:35,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224944714] [2021-05-22 01:55:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224944714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:35,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:35,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:35,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441987345] [2021-05-22 01:55:35,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:35,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:35,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:35,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:35,725 INFO L87 Difference]: Start difference. First operand 1535 states and 6068 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:35,787 INFO L93 Difference]: Finished difference Result 3265 states and 12030 transitions. [2021-05-22 01:55:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:35,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:35,793 INFO L225 Difference]: With dead ends: 3265 [2021-05-22 01:55:35,794 INFO L226 Difference]: Without dead ends: 2956 [2021-05-22 01:55:35,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-05-22 01:55:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 1448. [2021-05-22 01:55:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9896337249481686) internal successors, (5773), 1447 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5773 transitions. [2021-05-22 01:55:35,829 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5773 transitions. Word has length 25 [2021-05-22 01:55:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:35,829 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5773 transitions. [2021-05-22 01:55:35,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5773 transitions. [2021-05-22 01:55:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:35,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:35,831 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:35,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-22 01:55:35,831 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash 693784637, now seen corresponding path program 127 times [2021-05-22 01:55:35,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:35,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655878237] [2021-05-22 01:55:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:35,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:35,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655878237] [2021-05-22 01:55:35,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655878237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:35,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:35,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:35,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952537809] [2021-05-22 01:55:35,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:35,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:35,939 INFO L87 Difference]: Start difference. First operand 1448 states and 5773 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:35,990 INFO L93 Difference]: Finished difference Result 3114 states and 11547 transitions. [2021-05-22 01:55:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:35,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:35,995 INFO L225 Difference]: With dead ends: 3114 [2021-05-22 01:55:35,996 INFO L226 Difference]: Without dead ends: 2955 [2021-05-22 01:55:35,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-05-22 01:55:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 1496. [2021-05-22 01:55:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.9846153846153847) internal successors, (5957), 1495 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5957 transitions. [2021-05-22 01:55:36,032 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5957 transitions. Word has length 25 [2021-05-22 01:55:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:36,032 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5957 transitions. [2021-05-22 01:55:36,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5957 transitions. [2021-05-22 01:55:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:36,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:36,034 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:36,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-22 01:55:36,034 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash -314513347, now seen corresponding path program 128 times [2021-05-22 01:55:36,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:36,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639600351] [2021-05-22 01:55:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:36,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:36,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639600351] [2021-05-22 01:55:36,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639600351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:36,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:36,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:36,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129343246] [2021-05-22 01:55:36,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:36,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:36,136 INFO L87 Difference]: Start difference. First operand 1496 states and 5957 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:36,186 INFO L93 Difference]: Finished difference Result 3177 states and 11754 transitions. [2021-05-22 01:55:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:36,192 INFO L225 Difference]: With dead ends: 3177 [2021-05-22 01:55:36,192 INFO L226 Difference]: Without dead ends: 2923 [2021-05-22 01:55:36,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-05-22 01:55:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1464. [2021-05-22 01:55:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.9842788790157213) internal successors, (5829), 1463 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5829 transitions. [2021-05-22 01:55:36,230 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5829 transitions. Word has length 25 [2021-05-22 01:55:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:36,230 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 5829 transitions. [2021-05-22 01:55:36,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5829 transitions. [2021-05-22 01:55:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:36,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:36,232 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:36,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-22 01:55:36,232 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1682818143, now seen corresponding path program 129 times [2021-05-22 01:55:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:36,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724185143] [2021-05-22 01:55:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:36,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:36,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724185143] [2021-05-22 01:55:36,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724185143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:36,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:36,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:36,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822186273] [2021-05-22 01:55:36,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:36,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:36,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:36,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:36,334 INFO L87 Difference]: Start difference. First operand 1464 states and 5829 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:36,401 INFO L93 Difference]: Finished difference Result 3063 states and 11348 transitions. [2021-05-22 01:55:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:36,407 INFO L225 Difference]: With dead ends: 3063 [2021-05-22 01:55:36,407 INFO L226 Difference]: Without dead ends: 2904 [2021-05-22 01:55:36,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-05-22 01:55:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1480. [2021-05-22 01:55:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.973630831643002) internal successors, (5877), 1479 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 5877 transitions. [2021-05-22 01:55:36,460 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 5877 transitions. Word has length 25 [2021-05-22 01:55:36,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:36,460 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 5877 transitions. [2021-05-22 01:55:36,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 5877 transitions. [2021-05-22 01:55:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:36,463 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:36,463 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:36,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-22 01:55:36,464 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1603851169, now seen corresponding path program 130 times [2021-05-22 01:55:36,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:36,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296293006] [2021-05-22 01:55:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:36,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296293006] [2021-05-22 01:55:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296293006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:36,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:36,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:36,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506980173] [2021-05-22 01:55:36,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:36,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:36,564 INFO L87 Difference]: Start difference. First operand 1480 states and 5877 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:36,630 INFO L93 Difference]: Finished difference Result 3091 states and 11436 transitions. [2021-05-22 01:55:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:36,636 INFO L225 Difference]: With dead ends: 3091 [2021-05-22 01:55:36,636 INFO L226 Difference]: Without dead ends: 2888 [2021-05-22 01:55:36,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2021-05-22 01:55:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 1464. [2021-05-22 01:55:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.9788106630211892) internal successors, (5821), 1463 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5821 transitions. [2021-05-22 01:55:36,673 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5821 transitions. Word has length 25 [2021-05-22 01:55:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:36,673 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 5821 transitions. [2021-05-22 01:55:36,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5821 transitions. [2021-05-22 01:55:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:36,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:36,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:36,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-22 01:55:36,675 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash 84395103, now seen corresponding path program 131 times [2021-05-22 01:55:36,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:36,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685928015] [2021-05-22 01:55:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:36,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685928015] [2021-05-22 01:55:36,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685928015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:36,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:36,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:36,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77414693] [2021-05-22 01:55:36,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:36,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:36,763 INFO L87 Difference]: Start difference. First operand 1464 states and 5821 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:36,825 INFO L93 Difference]: Finished difference Result 3184 states and 11790 transitions. [2021-05-22 01:55:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:36,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:36,832 INFO L225 Difference]: With dead ends: 3184 [2021-05-22 01:55:36,832 INFO L226 Difference]: Without dead ends: 2997 [2021-05-22 01:55:36,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2021-05-22 01:55:36,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 1510. [2021-05-22 01:55:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.9615639496355204) internal successors, (5978), 1509 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5978 transitions. [2021-05-22 01:55:36,870 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5978 transitions. Word has length 25 [2021-05-22 01:55:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:36,871 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 5978 transitions. [2021-05-22 01:55:36,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5978 transitions. [2021-05-22 01:55:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:36,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:36,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:36,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-22 01:55:36,873 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash -268744387, now seen corresponding path program 132 times [2021-05-22 01:55:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:36,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169618460] [2021-05-22 01:55:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:36,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:36,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169618460] [2021-05-22 01:55:36,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169618460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:36,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:36,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:36,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559289175] [2021-05-22 01:55:36,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:36,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:36,990 INFO L87 Difference]: Start difference. First operand 1510 states and 5978 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:37,043 INFO L93 Difference]: Finished difference Result 3219 states and 11879 transitions. [2021-05-22 01:55:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:37,049 INFO L225 Difference]: With dead ends: 3219 [2021-05-22 01:55:37,050 INFO L226 Difference]: Without dead ends: 2935 [2021-05-22 01:55:37,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-05-22 01:55:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 1448. [2021-05-22 01:55:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.984105044920525) internal successors, (5765), 1447 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5765 transitions. [2021-05-22 01:55:37,087 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5765 transitions. Word has length 25 [2021-05-22 01:55:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:37,087 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5765 transitions. [2021-05-22 01:55:37,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5765 transitions. [2021-05-22 01:55:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:37,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:37,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:37,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-22 01:55:37,089 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -944238823, now seen corresponding path program 133 times [2021-05-22 01:55:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:37,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883355008] [2021-05-22 01:55:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:37,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883355008] [2021-05-22 01:55:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883355008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:37,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:37,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271340663] [2021-05-22 01:55:37,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:37,200 INFO L87 Difference]: Start difference. First operand 1448 states and 5765 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:37,256 INFO L93 Difference]: Finished difference Result 2992 states and 11083 transitions. [2021-05-22 01:55:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:37,261 INFO L225 Difference]: With dead ends: 2992 [2021-05-22 01:55:37,262 INFO L226 Difference]: Without dead ends: 2833 [2021-05-22 01:55:37,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-05-22 01:55:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1472. [2021-05-22 01:55:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.976206662134602) internal successors, (5849), 1471 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5849 transitions. [2021-05-22 01:55:37,300 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5849 transitions. Word has length 25 [2021-05-22 01:55:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:37,300 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5849 transitions. [2021-05-22 01:55:37,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5849 transitions. [2021-05-22 01:55:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:37,302 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:37,302 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:37,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-22 01:55:37,302 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:37,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1760793723, now seen corresponding path program 134 times [2021-05-22 01:55:37,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:37,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891711251] [2021-05-22 01:55:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:37,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:37,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891711251] [2021-05-22 01:55:37,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891711251] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:37,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:37,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467860113] [2021-05-22 01:55:37,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:37,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:37,399 INFO L87 Difference]: Start difference. First operand 1472 states and 5849 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:37,465 INFO L93 Difference]: Finished difference Result 3022 states and 11176 transitions. [2021-05-22 01:55:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:37,471 INFO L225 Difference]: With dead ends: 3022 [2021-05-22 01:55:37,471 INFO L226 Difference]: Without dead ends: 2817 [2021-05-22 01:55:37,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-05-22 01:55:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 1456. [2021-05-22 01:55:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.9814432989690722) internal successors, (5793), 1455 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5793 transitions. [2021-05-22 01:55:37,508 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5793 transitions. Word has length 25 [2021-05-22 01:55:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:37,509 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5793 transitions. [2021-05-22 01:55:37,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5793 transitions. [2021-05-22 01:55:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:37,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:37,511 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:37,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-22 01:55:37,511 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash 136823803, now seen corresponding path program 135 times [2021-05-22 01:55:37,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:37,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750243873] [2021-05-22 01:55:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:37,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:37,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750243873] [2021-05-22 01:55:37,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750243873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:37,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:37,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740724476] [2021-05-22 01:55:37,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:37,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:37,622 INFO L87 Difference]: Start difference. First operand 1456 states and 5793 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:37,694 INFO L93 Difference]: Finished difference Result 2990 states and 11070 transitions. [2021-05-22 01:55:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:37,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:37,700 INFO L225 Difference]: With dead ends: 2990 [2021-05-22 01:55:37,700 INFO L226 Difference]: Without dead ends: 2831 [2021-05-22 01:55:37,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-05-22 01:55:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1472. [2021-05-22 01:55:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9707681849082257) internal successors, (5841), 1471 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5841 transitions. [2021-05-22 01:55:37,736 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5841 transitions. Word has length 25 [2021-05-22 01:55:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:37,736 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5841 transitions. [2021-05-22 01:55:37,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5841 transitions. [2021-05-22 01:55:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:37,738 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:37,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:37,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-22 01:55:37,738 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1145121787, now seen corresponding path program 136 times [2021-05-22 01:55:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:37,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799645929] [2021-05-22 01:55:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:37,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799645929] [2021-05-22 01:55:37,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799645929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:37,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:37,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:37,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583630387] [2021-05-22 01:55:37,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:37,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:37,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:37,857 INFO L87 Difference]: Start difference. First operand 1472 states and 5841 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:37,921 INFO L93 Difference]: Finished difference Result 3018 states and 11158 transitions. [2021-05-22 01:55:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:37,927 INFO L225 Difference]: With dead ends: 3018 [2021-05-22 01:55:37,927 INFO L226 Difference]: Without dead ends: 2815 [2021-05-22 01:55:37,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-05-22 01:55:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 1456. [2021-05-22 01:55:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.9759450171821307) internal successors, (5785), 1455 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5785 transitions. [2021-05-22 01:55:37,962 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5785 transitions. Word has length 25 [2021-05-22 01:55:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:37,963 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5785 transitions. [2021-05-22 01:55:37,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5785 transitions. [2021-05-22 01:55:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:37,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:37,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:37,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-22 01:55:37,965 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1553985757, now seen corresponding path program 137 times [2021-05-22 01:55:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:37,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077901154] [2021-05-22 01:55:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:38,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:38,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077901154] [2021-05-22 01:55:38,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077901154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:38,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:38,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:38,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283817534] [2021-05-22 01:55:38,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:38,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:38,053 INFO L87 Difference]: Start difference. First operand 1456 states and 5785 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:38,131 INFO L93 Difference]: Finished difference Result 3064 states and 11339 transitions. [2021-05-22 01:55:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:38,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:38,137 INFO L225 Difference]: With dead ends: 3064 [2021-05-22 01:55:38,137 INFO L226 Difference]: Without dead ends: 2875 [2021-05-22 01:55:38,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-05-22 01:55:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1486. [2021-05-22 01:55:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.958249158249158) internal successors, (5878), 1485 states have internal predecessors, (5878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5878 transitions. [2021-05-22 01:55:38,173 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5878 transitions. Word has length 25 [2021-05-22 01:55:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:38,173 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5878 transitions. [2021-05-22 01:55:38,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5878 transitions. [2021-05-22 01:55:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:38,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:38,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:38,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-22 01:55:38,175 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash -489351237, now seen corresponding path program 138 times [2021-05-22 01:55:38,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:38,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648054209] [2021-05-22 01:55:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:38,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:38,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648054209] [2021-05-22 01:55:38,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648054209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:38,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:38,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396442265] [2021-05-22 01:55:38,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:38,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:38,269 INFO L87 Difference]: Start difference. First operand 1486 states and 5878 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:38,333 INFO L93 Difference]: Finished difference Result 3062 states and 11304 transitions. [2021-05-22 01:55:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:38,339 INFO L225 Difference]: With dead ends: 3062 [2021-05-22 01:55:38,339 INFO L226 Difference]: Without dead ends: 2837 [2021-05-22 01:55:38,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2021-05-22 01:55:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 1448. [2021-05-22 01:55:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9813407049067036) internal successors, (5761), 1447 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5761 transitions. [2021-05-22 01:55:38,374 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5761 transitions. Word has length 25 [2021-05-22 01:55:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:38,374 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5761 transitions. [2021-05-22 01:55:38,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5761 transitions. [2021-05-22 01:55:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:38,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:38,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:38,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-22 01:55:38,376 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1835768257, now seen corresponding path program 139 times [2021-05-22 01:55:38,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:38,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030100490] [2021-05-22 01:55:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:38,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:38,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030100490] [2021-05-22 01:55:38,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030100490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:38,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:38,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:38,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652964323] [2021-05-22 01:55:38,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:38,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:38,458 INFO L87 Difference]: Start difference. First operand 1448 states and 5761 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:38,520 INFO L93 Difference]: Finished difference Result 3235 states and 11988 transitions. [2021-05-22 01:55:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:38,526 INFO L225 Difference]: With dead ends: 3235 [2021-05-22 01:55:38,526 INFO L226 Difference]: Without dead ends: 3046 [2021-05-22 01:55:38,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-05-22 01:55:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1517. [2021-05-22 01:55:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.962401055408971) internal successors, (6007), 1516 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 6007 transitions. [2021-05-22 01:55:38,563 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 6007 transitions. Word has length 25 [2021-05-22 01:55:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:38,563 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 6007 transitions. [2021-05-22 01:55:38,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 6007 transitions. [2021-05-22 01:55:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:38,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:38,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:38,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-22 01:55:38,565 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 415862045, now seen corresponding path program 140 times [2021-05-22 01:55:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:38,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577615178] [2021-05-22 01:55:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:38,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:38,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577615178] [2021-05-22 01:55:38,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577615178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:38,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:38,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:38,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3330674] [2021-05-22 01:55:38,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:38,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:38,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:38,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:38,646 INFO L87 Difference]: Start difference. First operand 1517 states and 6007 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:38,717 INFO L93 Difference]: Finished difference Result 3233 states and 11953 transitions. [2021-05-22 01:55:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:38,724 INFO L225 Difference]: With dead ends: 3233 [2021-05-22 01:55:38,724 INFO L226 Difference]: Without dead ends: 3016 [2021-05-22 01:55:38,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-05-22 01:55:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 1487. [2021-05-22 01:55:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.9697173620457606) internal successors, (5899), 1486 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 5899 transitions. [2021-05-22 01:55:38,777 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 5899 transitions. Word has length 25 [2021-05-22 01:55:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:38,777 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 5899 transitions. [2021-05-22 01:55:38,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 5899 transitions. [2021-05-22 01:55:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:38,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:38,792 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:38,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-22 01:55:38,792 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:38,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1900401763, now seen corresponding path program 141 times [2021-05-22 01:55:38,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:38,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226148910] [2021-05-22 01:55:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:38,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:38,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226148910] [2021-05-22 01:55:38,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226148910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:38,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:38,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:38,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605121262] [2021-05-22 01:55:38,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:38,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:38,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:38,881 INFO L87 Difference]: Start difference. First operand 1487 states and 5899 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:38,953 INFO L93 Difference]: Finished difference Result 3303 states and 12207 transitions. [2021-05-22 01:55:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:38,961 INFO L225 Difference]: With dead ends: 3303 [2021-05-22 01:55:38,961 INFO L226 Difference]: Without dead ends: 3114 [2021-05-22 01:55:38,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2021-05-22 01:55:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 1550. [2021-05-22 01:55:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.9418979987088445) internal successors, (6106), 1549 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6106 transitions. [2021-05-22 01:55:39,015 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6106 transitions. Word has length 25 [2021-05-22 01:55:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:39,015 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 6106 transitions. [2021-05-22 01:55:39,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6106 transitions. [2021-05-22 01:55:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:39,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:39,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:39,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-22 01:55:39,018 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1838777245, now seen corresponding path program 142 times [2021-05-22 01:55:39,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:39,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247575822] [2021-05-22 01:55:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:39,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247575822] [2021-05-22 01:55:39,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247575822] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:39,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:39,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757083037] [2021-05-22 01:55:39,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:39,123 INFO L87 Difference]: Start difference. First operand 1550 states and 6106 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:39,189 INFO L93 Difference]: Finished difference Result 3336 states and 12290 transitions. [2021-05-22 01:55:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:39,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:39,197 INFO L225 Difference]: With dead ends: 3336 [2021-05-22 01:55:39,197 INFO L226 Difference]: Without dead ends: 3051 [2021-05-22 01:55:39,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-05-22 01:55:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1487. [2021-05-22 01:55:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.9488559892328396) internal successors, (5868), 1486 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 5868 transitions. [2021-05-22 01:55:39,250 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 5868 transitions. Word has length 25 [2021-05-22 01:55:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:39,250 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 5868 transitions. [2021-05-22 01:55:39,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 5868 transitions. [2021-05-22 01:55:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:39,253 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:39,253 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:39,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-05-22 01:55:39,254 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:39,254 INFO L82 PathProgramCache]: Analyzing trace with hash -918054149, now seen corresponding path program 143 times [2021-05-22 01:55:39,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:39,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337096047] [2021-05-22 01:55:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:39,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:39,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337096047] [2021-05-22 01:55:39,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337096047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:39,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:39,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:39,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917577101] [2021-05-22 01:55:39,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:39,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:39,354 INFO L87 Difference]: Start difference. First operand 1487 states and 5868 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:39,418 INFO L93 Difference]: Finished difference Result 3282 states and 12115 transitions. [2021-05-22 01:55:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:39,424 INFO L225 Difference]: With dead ends: 3282 [2021-05-22 01:55:39,424 INFO L226 Difference]: Without dead ends: 3095 [2021-05-22 01:55:39,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-05-22 01:55:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 1533. [2021-05-22 01:55:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.9327676240208875) internal successors, (6025), 1532 states have internal predecessors, (6025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 6025 transitions. [2021-05-22 01:55:39,461 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 6025 transitions. Word has length 25 [2021-05-22 01:55:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:39,461 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 6025 transitions. [2021-05-22 01:55:39,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 6025 transitions. [2021-05-22 01:55:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:39,463 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:39,463 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:39,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-22 01:55:39,464 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1019523549, now seen corresponding path program 144 times [2021-05-22 01:55:39,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:39,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784457144] [2021-05-22 01:55:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:39,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784457144] [2021-05-22 01:55:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784457144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:39,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:39,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235831820] [2021-05-22 01:55:39,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:39,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:39,562 INFO L87 Difference]: Start difference. First operand 1533 states and 6025 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:39,615 INFO L93 Difference]: Finished difference Result 3317 states and 12204 transitions. [2021-05-22 01:55:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:39,621 INFO L225 Difference]: With dead ends: 3317 [2021-05-22 01:55:39,621 INFO L226 Difference]: Without dead ends: 2994 [2021-05-22 01:55:39,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-05-22 01:55:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 1432. [2021-05-22 01:55:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.989517819706499) internal successors, (5709), 1431 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5709 transitions. [2021-05-22 01:55:39,657 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5709 transitions. Word has length 25 [2021-05-22 01:55:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:39,657 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5709 transitions. [2021-05-22 01:55:39,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5709 transitions. [2021-05-22 01:55:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:39,659 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:39,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:39,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-05-22 01:55:39,659 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1287212865, now seen corresponding path program 145 times [2021-05-22 01:55:39,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:39,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043011095] [2021-05-22 01:55:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:39,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043011095] [2021-05-22 01:55:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043011095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:39,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:39,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:39,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711773361] [2021-05-22 01:55:39,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:39,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:39,758 INFO L87 Difference]: Start difference. First operand 1432 states and 5709 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:39,815 INFO L93 Difference]: Finished difference Result 3078 states and 11404 transitions. [2021-05-22 01:55:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:39,821 INFO L225 Difference]: With dead ends: 3078 [2021-05-22 01:55:39,821 INFO L226 Difference]: Without dead ends: 2919 [2021-05-22 01:55:39,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-05-22 01:55:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 1500. [2021-05-22 01:55:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.9873248832555035) internal successors, (5977), 1499 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5977 transitions. [2021-05-22 01:55:39,857 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5977 transitions. Word has length 25 [2021-05-22 01:55:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:39,857 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 5977 transitions. [2021-05-22 01:55:39,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5977 transitions. [2021-05-22 01:55:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:39,859 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:39,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:39,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-22 01:55:39,859 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1999456447, now seen corresponding path program 146 times [2021-05-22 01:55:39,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:39,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10850671] [2021-05-22 01:55:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:39,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10850671] [2021-05-22 01:55:39,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10850671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:39,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:39,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186341641] [2021-05-22 01:55:39,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:39,954 INFO L87 Difference]: Start difference. First operand 1500 states and 5977 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:40,012 INFO L93 Difference]: Finished difference Result 3141 states and 11611 transitions. [2021-05-22 01:55:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:40,017 INFO L225 Difference]: With dead ends: 3141 [2021-05-22 01:55:40,018 INFO L226 Difference]: Without dead ends: 2887 [2021-05-22 01:55:40,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-05-22 01:55:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1468. [2021-05-22 01:55:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.9870483980913427) internal successors, (5849), 1467 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5849 transitions. [2021-05-22 01:55:40,053 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5849 transitions. Word has length 25 [2021-05-22 01:55:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:40,053 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 5849 transitions. [2021-05-22 01:55:40,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5849 transitions. [2021-05-22 01:55:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:40,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:40,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:40,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-22 01:55:40,055 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1248598181, now seen corresponding path program 147 times [2021-05-22 01:55:40,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:40,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842842517] [2021-05-22 01:55:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:40,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:40,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842842517] [2021-05-22 01:55:40,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842842517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:40,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:40,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:40,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231011423] [2021-05-22 01:55:40,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:40,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:40,156 INFO L87 Difference]: Start difference. First operand 1468 states and 5849 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:40,207 INFO L93 Difference]: Finished difference Result 3029 states and 11210 transitions. [2021-05-22 01:55:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:40,213 INFO L225 Difference]: With dead ends: 3029 [2021-05-22 01:55:40,213 INFO L226 Difference]: Without dead ends: 2870 [2021-05-22 01:55:40,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-05-22 01:55:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1484. [2021-05-22 01:55:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.9763991908294) internal successors, (5897), 1483 states have internal predecessors, (5897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5897 transitions. [2021-05-22 01:55:40,249 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5897 transitions. Word has length 25 [2021-05-22 01:55:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:40,250 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 5897 transitions. [2021-05-22 01:55:40,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5897 transitions. [2021-05-22 01:55:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:40,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:40,252 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:40,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-05-22 01:55:40,252 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1456434365, now seen corresponding path program 148 times [2021-05-22 01:55:40,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:40,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326869282] [2021-05-22 01:55:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:40,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326869282] [2021-05-22 01:55:40,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326869282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:40,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:40,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:40,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275584423] [2021-05-22 01:55:40,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:40,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:40,357 INFO L87 Difference]: Start difference. First operand 1484 states and 5897 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:40,427 INFO L93 Difference]: Finished difference Result 3059 states and 11303 transitions. [2021-05-22 01:55:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:40,433 INFO L225 Difference]: With dead ends: 3059 [2021-05-22 01:55:40,433 INFO L226 Difference]: Without dead ends: 2854 [2021-05-22 01:55:40,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-05-22 01:55:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1468. [2021-05-22 01:55:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.98159509202454) internal successors, (5841), 1467 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5841 transitions. [2021-05-22 01:55:40,468 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5841 transitions. Word has length 25 [2021-05-22 01:55:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:40,468 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 5841 transitions. [2021-05-22 01:55:40,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5841 transitions. [2021-05-22 01:55:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:40,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:40,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:40,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-22 01:55:40,470 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:40,470 INFO L82 PathProgramCache]: Analyzing trace with hash 818270879, now seen corresponding path program 149 times [2021-05-22 01:55:40,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:40,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89095476] [2021-05-22 01:55:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:40,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89095476] [2021-05-22 01:55:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89095476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:40,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:40,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940781874] [2021-05-22 01:55:40,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:40,560 INFO L87 Difference]: Start difference. First operand 1468 states and 5841 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:40,624 INFO L93 Difference]: Finished difference Result 3169 states and 11708 transitions. [2021-05-22 01:55:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:40,630 INFO L225 Difference]: With dead ends: 3169 [2021-05-22 01:55:40,630 INFO L226 Difference]: Without dead ends: 2980 [2021-05-22 01:55:40,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-05-22 01:55:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1531. [2021-05-22 01:55:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.9529411764705884) internal successors, (6048), 1530 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6048 transitions. [2021-05-22 01:55:40,678 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6048 transitions. Word has length 25 [2021-05-22 01:55:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:40,678 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 6048 transitions. [2021-05-22 01:55:40,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6048 transitions. [2021-05-22 01:55:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:40,680 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:40,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:40,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-22 01:55:40,680 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1116323837, now seen corresponding path program 150 times [2021-05-22 01:55:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:40,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39001102] [2021-05-22 01:55:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:40,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:40,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39001102] [2021-05-22 01:55:40,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39001102] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:40,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:40,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:40,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715522865] [2021-05-22 01:55:40,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:40,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:40,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:40,768 INFO L87 Difference]: Start difference. First operand 1531 states and 6048 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:40,819 INFO L93 Difference]: Finished difference Result 3202 states and 11791 transitions. [2021-05-22 01:55:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:40,824 INFO L225 Difference]: With dead ends: 3202 [2021-05-22 01:55:40,824 INFO L226 Difference]: Without dead ends: 2893 [2021-05-22 01:55:40,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-05-22 01:55:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1444. [2021-05-22 01:55:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.986832986832987) internal successors, (5753), 1443 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5753 transitions. [2021-05-22 01:55:40,859 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5753 transitions. Word has length 25 [2021-05-22 01:55:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:40,859 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5753 transitions. [2021-05-22 01:55:40,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5753 transitions. [2021-05-22 01:55:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:40,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:40,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:40,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-05-22 01:55:40,861 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1279544867, now seen corresponding path program 151 times [2021-05-22 01:55:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:40,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654687747] [2021-05-22 01:55:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:40,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:40,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654687747] [2021-05-22 01:55:40,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654687747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:40,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:40,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:40,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976463884] [2021-05-22 01:55:40,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:40,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:40,965 INFO L87 Difference]: Start difference. First operand 1444 states and 5753 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:41,021 INFO L93 Difference]: Finished difference Result 3001 states and 11117 transitions. [2021-05-22 01:55:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:41,027 INFO L225 Difference]: With dead ends: 3001 [2021-05-22 01:55:41,027 INFO L226 Difference]: Without dead ends: 2842 [2021-05-22 01:55:41,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-05-22 01:55:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1492. [2021-05-22 01:55:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.9818913480885314) internal successors, (5937), 1491 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 5937 transitions. [2021-05-22 01:55:41,062 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 5937 transitions. Word has length 25 [2021-05-22 01:55:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:41,062 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 5937 transitions. [2021-05-22 01:55:41,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 5937 transitions. [2021-05-22 01:55:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:41,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:41,064 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:41,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-05-22 01:55:41,064 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2007124445, now seen corresponding path program 152 times [2021-05-22 01:55:41,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:41,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24405155] [2021-05-22 01:55:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:41,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:41,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24405155] [2021-05-22 01:55:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24405155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:41,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:41,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:41,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108477060] [2021-05-22 01:55:41,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:41,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:41,177 INFO L87 Difference]: Start difference. First operand 1492 states and 5937 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:41,238 INFO L93 Difference]: Finished difference Result 3064 states and 11324 transitions. [2021-05-22 01:55:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:41,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:41,244 INFO L225 Difference]: With dead ends: 3064 [2021-05-22 01:55:41,244 INFO L226 Difference]: Without dead ends: 2810 [2021-05-22 01:55:41,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-05-22 01:55:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1460. [2021-05-22 01:55:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.9814941740918437) internal successors, (5809), 1459 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5809 transitions. [2021-05-22 01:55:41,279 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5809 transitions. Word has length 25 [2021-05-22 01:55:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:41,279 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5809 transitions. [2021-05-22 01:55:41,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5809 transitions. [2021-05-22 01:55:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:41,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:41,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:41,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-05-22 01:55:41,281 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1799001343, now seen corresponding path program 153 times [2021-05-22 01:55:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:41,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553693630] [2021-05-22 01:55:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:41,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553693630] [2021-05-22 01:55:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553693630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:41,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:41,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978000676] [2021-05-22 01:55:41,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:41,386 INFO L87 Difference]: Start difference. First operand 1460 states and 5809 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:41,451 INFO L93 Difference]: Finished difference Result 2906 states and 10766 transitions. [2021-05-22 01:55:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:41,458 INFO L225 Difference]: With dead ends: 2906 [2021-05-22 01:55:41,458 INFO L226 Difference]: Without dead ends: 2747 [2021-05-22 01:55:41,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-05-22 01:55:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1476. [2021-05-22 01:55:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.9708474576271184) internal successors, (5857), 1475 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5857 transitions. [2021-05-22 01:55:41,509 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5857 transitions. Word has length 25 [2021-05-22 01:55:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:41,509 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 5857 transitions. [2021-05-22 01:55:41,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5857 transitions. [2021-05-22 01:55:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:41,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:41,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:41,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-05-22 01:55:41,512 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash -143270657, now seen corresponding path program 154 times [2021-05-22 01:55:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:41,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579739875] [2021-05-22 01:55:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:41,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:41,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579739875] [2021-05-22 01:55:41,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579739875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:41,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:41,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:41,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970273116] [2021-05-22 01:55:41,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:41,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:41,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:41,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:41,621 INFO L87 Difference]: Start difference. First operand 1476 states and 5857 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:41,698 INFO L93 Difference]: Finished difference Result 2794 states and 10429 transitions. [2021-05-22 01:55:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:41,703 INFO L225 Difference]: With dead ends: 2794 [2021-05-22 01:55:41,704 INFO L226 Difference]: Without dead ends: 2603 [2021-05-22 01:55:41,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-05-22 01:55:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1460. [2021-05-22 01:55:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.976010966415353) internal successors, (5801), 1459 states have internal predecessors, (5801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5801 transitions. [2021-05-22 01:55:41,738 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5801 transitions. Word has length 25 [2021-05-22 01:55:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:41,739 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5801 transitions. [2021-05-22 01:55:41,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5801 transitions. [2021-05-22 01:55:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:41,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:41,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:41,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-05-22 01:55:41,741 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1544975615, now seen corresponding path program 155 times [2021-05-22 01:55:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:41,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733353590] [2021-05-22 01:55:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733353590] [2021-05-22 01:55:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733353590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:41,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:41,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:41,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578019443] [2021-05-22 01:55:41,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:41,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:41,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:41,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:41,836 INFO L87 Difference]: Start difference. First operand 1460 states and 5801 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:41,900 INFO L93 Difference]: Finished difference Result 3041 states and 11257 transitions. [2021-05-22 01:55:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:41,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:41,905 INFO L225 Difference]: With dead ends: 3041 [2021-05-22 01:55:41,905 INFO L226 Difference]: Without dead ends: 2866 [2021-05-22 01:55:41,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-05-22 01:55:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 1500. [2021-05-22 01:55:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.963308872581721) internal successors, (5941), 1499 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5941 transitions. [2021-05-22 01:55:41,941 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5941 transitions. Word has length 25 [2021-05-22 01:55:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:41,941 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 5941 transitions. [2021-05-22 01:55:41,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5941 transitions. [2021-05-22 01:55:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:41,943 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:41,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:41,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-05-22 01:55:41,943 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash -110548771, now seen corresponding path program 156 times [2021-05-22 01:55:41,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:41,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077059990] [2021-05-22 01:55:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:42,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077059990] [2021-05-22 01:55:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077059990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:42,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:42,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643885438] [2021-05-22 01:55:42,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:42,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:42,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:42,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:42,038 INFO L87 Difference]: Start difference. First operand 1500 states and 5941 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:42,097 INFO L93 Difference]: Finished difference Result 2993 states and 11057 transitions. [2021-05-22 01:55:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:42,103 INFO L225 Difference]: With dead ends: 2993 [2021-05-22 01:55:42,103 INFO L226 Difference]: Without dead ends: 2715 [2021-05-22 01:55:42,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-05-22 01:55:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1444. [2021-05-22 01:55:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9812889812889813) internal successors, (5745), 1443 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5745 transitions. [2021-05-22 01:55:42,137 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5745 transitions. Word has length 25 [2021-05-22 01:55:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:42,137 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5745 transitions. [2021-05-22 01:55:42,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5745 transitions. [2021-05-22 01:55:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:42,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:42,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:42,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-05-22 01:55:42,139 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1747685561, now seen corresponding path program 157 times [2021-05-22 01:55:42,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:42,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96952681] [2021-05-22 01:55:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:42,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:42,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96952681] [2021-05-22 01:55:42,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96952681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:42,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:42,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:42,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832699498] [2021-05-22 01:55:42,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:42,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:42,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:42,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:42,236 INFO L87 Difference]: Start difference. First operand 1444 states and 5745 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:42,296 INFO L93 Difference]: Finished difference Result 2895 states and 10717 transitions. [2021-05-22 01:55:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:42,301 INFO L225 Difference]: With dead ends: 2895 [2021-05-22 01:55:42,301 INFO L226 Difference]: Without dead ends: 2736 [2021-05-22 01:55:42,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-05-22 01:55:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 1468. [2021-05-22 01:55:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.9734151329243352) internal successors, (5829), 1467 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5829 transitions. [2021-05-22 01:55:42,336 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5829 transitions. Word has length 25 [2021-05-22 01:55:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:42,336 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 5829 transitions. [2021-05-22 01:55:42,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5829 transitions. [2021-05-22 01:55:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:42,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:42,338 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:42,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-05-22 01:55:42,338 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 157750811, now seen corresponding path program 158 times [2021-05-22 01:55:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:42,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367403333] [2021-05-22 01:55:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:42,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:42,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367403333] [2021-05-22 01:55:42,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367403333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:42,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:42,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:42,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799599998] [2021-05-22 01:55:42,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:42,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:42,435 INFO L87 Difference]: Start difference. First operand 1468 states and 5829 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:42,507 INFO L93 Difference]: Finished difference Result 2925 states and 10810 transitions. [2021-05-22 01:55:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:42,513 INFO L225 Difference]: With dead ends: 2925 [2021-05-22 01:55:42,513 INFO L226 Difference]: Without dead ends: 2720 [2021-05-22 01:55:42,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-05-22 01:55:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1452. [2021-05-22 01:55:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.9786354238456236) internal successors, (5773), 1451 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 5773 transitions. [2021-05-22 01:55:42,570 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 5773 transitions. Word has length 25 [2021-05-22 01:55:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:42,570 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 5773 transitions. [2021-05-22 01:55:42,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 5773 transitions. [2021-05-22 01:55:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:42,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:42,572 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:42,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-22 01:55:42,572 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 253007003, now seen corresponding path program 159 times [2021-05-22 01:55:42,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:42,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663690211] [2021-05-22 01:55:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:42,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:42,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663690211] [2021-05-22 01:55:42,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663690211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:42,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:42,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847268334] [2021-05-22 01:55:42,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:42,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:42,664 INFO L87 Difference]: Start difference. First operand 1452 states and 5773 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:42,723 INFO L93 Difference]: Finished difference Result 2849 states and 10552 transitions. [2021-05-22 01:55:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:42,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:42,729 INFO L225 Difference]: With dead ends: 2849 [2021-05-22 01:55:42,729 INFO L226 Difference]: Without dead ends: 2690 [2021-05-22 01:55:42,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-05-22 01:55:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 1468. [2021-05-22 01:55:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.9679618268575325) internal successors, (5821), 1467 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5821 transitions. [2021-05-22 01:55:42,762 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5821 transitions. Word has length 25 [2021-05-22 01:55:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:42,763 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 5821 transitions. [2021-05-22 01:55:42,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5821 transitions. [2021-05-22 01:55:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:42,764 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:42,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:42,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-05-22 01:55:42,765 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1689264997, now seen corresponding path program 160 times [2021-05-22 01:55:42,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:42,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137015584] [2021-05-22 01:55:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:42,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:42,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137015584] [2021-05-22 01:55:42,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137015584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:42,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:42,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:42,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716520178] [2021-05-22 01:55:42,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:42,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:42,868 INFO L87 Difference]: Start difference. First operand 1468 states and 5821 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:42,940 INFO L93 Difference]: Finished difference Result 2737 states and 10215 transitions. [2021-05-22 01:55:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:42,945 INFO L225 Difference]: With dead ends: 2737 [2021-05-22 01:55:42,945 INFO L226 Difference]: Without dead ends: 2546 [2021-05-22 01:55:42,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-05-22 01:55:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1452. [2021-05-22 01:55:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.9731219848380426) internal successors, (5765), 1451 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 5765 transitions. [2021-05-22 01:55:42,978 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 5765 transitions. Word has length 25 [2021-05-22 01:55:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:42,978 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 5765 transitions. [2021-05-22 01:55:42,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 5765 transitions. [2021-05-22 01:55:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:42,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:42,980 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:42,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-05-22 01:55:42,980 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1670168957, now seen corresponding path program 161 times [2021-05-22 01:55:42,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:42,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919470718] [2021-05-22 01:55:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:43,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:43,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919470718] [2021-05-22 01:55:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919470718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210293411] [2021-05-22 01:55:43,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:43,093 INFO L87 Difference]: Start difference. First operand 1452 states and 5765 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:43,164 INFO L93 Difference]: Finished difference Result 2887 states and 10689 transitions. [2021-05-22 01:55:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:43,169 INFO L225 Difference]: With dead ends: 2887 [2021-05-22 01:55:43,170 INFO L226 Difference]: Without dead ends: 2698 [2021-05-22 01:55:43,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-05-22 01:55:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1476. [2021-05-22 01:55:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.96) internal successors, (5841), 1475 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5841 transitions. [2021-05-22 01:55:43,203 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5841 transitions. Word has length 25 [2021-05-22 01:55:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:43,204 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 5841 transitions. [2021-05-22 01:55:43,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5841 transitions. [2021-05-22 01:55:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:43,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:43,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:43,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-22 01:55:43,206 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 929216859, now seen corresponding path program 162 times [2021-05-22 01:55:43,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:43,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260331921] [2021-05-22 01:55:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:43,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:43,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260331921] [2021-05-22 01:55:43,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260331921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:43,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:43,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:43,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075969491] [2021-05-22 01:55:43,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:43,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:43,305 INFO L87 Difference]: Start difference. First operand 1476 states and 5841 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:43,377 INFO L93 Difference]: Finished difference Result 2745 states and 10235 transitions. [2021-05-22 01:55:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:43,382 INFO L225 Difference]: With dead ends: 2745 [2021-05-22 01:55:43,382 INFO L226 Difference]: Without dead ends: 2538 [2021-05-22 01:55:43,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-05-22 01:55:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1444. [2021-05-22 01:55:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9785169785169785) internal successors, (5741), 1443 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5741 transitions. [2021-05-22 01:55:43,417 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5741 transitions. Word has length 25 [2021-05-22 01:55:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:43,417 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5741 transitions. [2021-05-22 01:55:43,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5741 transitions. [2021-05-22 01:55:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:43,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:43,419 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:43,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-05-22 01:55:43,419 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1719585057, now seen corresponding path program 163 times [2021-05-22 01:55:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:43,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248323860] [2021-05-22 01:55:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:43,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:43,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248323860] [2021-05-22 01:55:43,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248323860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:43,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:43,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:43,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737071716] [2021-05-22 01:55:43,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:43,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:43,519 INFO L87 Difference]: Start difference. First operand 1444 states and 5741 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:43,582 INFO L93 Difference]: Finished difference Result 3119 states and 11567 transitions. [2021-05-22 01:55:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:43,588 INFO L225 Difference]: With dead ends: 3119 [2021-05-22 01:55:43,588 INFO L226 Difference]: Without dead ends: 2930 [2021-05-22 01:55:43,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-05-22 01:55:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1496. [2021-05-22 01:55:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.97123745819398) internal successors, (5937), 1495 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5937 transitions. [2021-05-22 01:55:43,624 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5937 transitions. Word has length 25 [2021-05-22 01:55:43,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:43,624 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5937 transitions. [2021-05-22 01:55:43,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5937 transitions. [2021-05-22 01:55:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:43,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:43,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:43,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-05-22 01:55:43,626 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:43,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1834430141, now seen corresponding path program 164 times [2021-05-22 01:55:43,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:43,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441907540] [2021-05-22 01:55:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:43,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:43,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441907540] [2021-05-22 01:55:43,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441907540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:43,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:43,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:43,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678398998] [2021-05-22 01:55:43,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:43,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:43,726 INFO L87 Difference]: Start difference. First operand 1496 states and 5937 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:43,805 INFO L93 Difference]: Finished difference Result 3105 states and 11498 transitions. [2021-05-22 01:55:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:43,811 INFO L225 Difference]: With dead ends: 3105 [2021-05-22 01:55:43,811 INFO L226 Difference]: Without dead ends: 2906 [2021-05-22 01:55:43,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2021-05-22 01:55:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 1472. [2021-05-22 01:55:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.976206662134602) internal successors, (5849), 1471 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5849 transitions. [2021-05-22 01:55:43,846 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5849 transitions. Word has length 25 [2021-05-22 01:55:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:43,846 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5849 transitions. [2021-05-22 01:55:43,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5849 transitions. [2021-05-22 01:55:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:43,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:43,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:43,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-05-22 01:55:43,849 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash 754346813, now seen corresponding path program 165 times [2021-05-22 01:55:43,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:43,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97340341] [2021-05-22 01:55:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:43,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:43,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97340341] [2021-05-22 01:55:43,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97340341] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:43,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:43,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:43,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507866279] [2021-05-22 01:55:43,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:43,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:43,946 INFO L87 Difference]: Start difference. First operand 1472 states and 5849 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:44,017 INFO L93 Difference]: Finished difference Result 3142 states and 11614 transitions. [2021-05-22 01:55:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:44,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:44,023 INFO L225 Difference]: With dead ends: 3142 [2021-05-22 01:55:44,023 INFO L226 Difference]: Without dead ends: 2953 [2021-05-22 01:55:44,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-05-22 01:55:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1535. [2021-05-22 01:55:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.9478487614080833) internal successors, (6056), 1534 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6056 transitions. [2021-05-22 01:55:44,059 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6056 transitions. Word has length 25 [2021-05-22 01:55:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:44,059 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6056 transitions. [2021-05-22 01:55:44,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6056 transitions. [2021-05-22 01:55:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:44,061 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:44,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:44,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-05-22 01:55:44,062 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1520667587, now seen corresponding path program 166 times [2021-05-22 01:55:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445574089] [2021-05-22 01:55:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:44,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:44,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445574089] [2021-05-22 01:55:44,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445574089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:44,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:44,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:44,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470912037] [2021-05-22 01:55:44,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:44,155 INFO L87 Difference]: Start difference. First operand 1535 states and 6056 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:44,206 INFO L93 Difference]: Finished difference Result 3175 states and 11697 transitions. [2021-05-22 01:55:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:44,211 INFO L225 Difference]: With dead ends: 3175 [2021-05-22 01:55:44,212 INFO L226 Difference]: Without dead ends: 2890 [2021-05-22 01:55:44,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-05-22 01:55:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1472. [2021-05-22 01:55:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.957171991842284) internal successors, (5821), 1471 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5821 transitions. [2021-05-22 01:55:44,246 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5821 transitions. Word has length 25 [2021-05-22 01:55:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:44,247 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5821 transitions. [2021-05-22 01:55:44,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5821 transitions. [2021-05-22 01:55:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:44,248 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:44,249 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:44,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-05-22 01:55:44,249 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 500513947, now seen corresponding path program 167 times [2021-05-22 01:55:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:44,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014275585] [2021-05-22 01:55:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:44,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:44,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014275585] [2021-05-22 01:55:44,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014275585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:44,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:44,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:44,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155263589] [2021-05-22 01:55:44,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:44,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:44,383 INFO L87 Difference]: Start difference. First operand 1472 states and 5821 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:44,460 INFO L93 Difference]: Finished difference Result 3091 states and 11422 transitions. [2021-05-22 01:55:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:44,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:44,467 INFO L225 Difference]: With dead ends: 3091 [2021-05-22 01:55:44,467 INFO L226 Difference]: Without dead ends: 2916 [2021-05-22 01:55:44,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-05-22 01:55:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1512. [2021-05-22 01:55:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.9450694904037062) internal successors, (5961), 1511 states have internal predecessors, (5961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5961 transitions. [2021-05-22 01:55:44,518 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5961 transitions. Word has length 25 [2021-05-22 01:55:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:44,518 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5961 transitions. [2021-05-22 01:55:44,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5961 transitions. [2021-05-22 01:55:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:44,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:44,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:44,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-05-22 01:55:44,521 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 718865533, now seen corresponding path program 168 times [2021-05-22 01:55:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:44,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884279408] [2021-05-22 01:55:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:44,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884279408] [2021-05-22 01:55:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884279408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:44,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:44,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704395163] [2021-05-22 01:55:44,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:44,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:44,636 INFO L87 Difference]: Start difference. First operand 1512 states and 5961 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:44,687 INFO L93 Difference]: Finished difference Result 3043 states and 11222 transitions. [2021-05-22 01:55:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:44,693 INFO L225 Difference]: With dead ends: 3043 [2021-05-22 01:55:44,693 INFO L226 Difference]: Without dead ends: 2741 [2021-05-22 01:55:44,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-05-22 01:55:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 1432. [2021-05-22 01:55:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.9853249475890986) internal successors, (5703), 1431 states have internal predecessors, (5703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5703 transitions. [2021-05-22 01:55:44,727 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5703 transitions. Word has length 25 [2021-05-22 01:55:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:44,727 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5703 transitions. [2021-05-22 01:55:44,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5703 transitions. [2021-05-22 01:55:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:44,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:44,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:44,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-05-22 01:55:44,729 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash -885386243, now seen corresponding path program 169 times [2021-05-22 01:55:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:44,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481525079] [2021-05-22 01:55:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:44,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:44,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481525079] [2021-05-22 01:55:44,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481525079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:44,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:44,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696623093] [2021-05-22 01:55:44,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:44,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:44,818 INFO L87 Difference]: Start difference. First operand 1432 states and 5703 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:44,872 INFO L93 Difference]: Finished difference Result 3020 states and 11214 transitions. [2021-05-22 01:55:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:44,878 INFO L225 Difference]: With dead ends: 3020 [2021-05-22 01:55:44,878 INFO L226 Difference]: Without dead ends: 2861 [2021-05-22 01:55:44,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-22 01:55:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 1488. [2021-05-22 01:55:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.9858776059179557) internal successors, (5927), 1487 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5927 transitions. [2021-05-22 01:55:44,914 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5927 transitions. Word has length 25 [2021-05-22 01:55:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:44,914 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 5927 transitions. [2021-05-22 01:55:44,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5927 transitions. [2021-05-22 01:55:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:44,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:44,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-22 01:55:44,916 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1893684227, now seen corresponding path program 170 times [2021-05-22 01:55:44,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:44,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046737958] [2021-05-22 01:55:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:45,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:45,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046737958] [2021-05-22 01:55:45,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046737958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:45,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:45,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:45,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359290471] [2021-05-22 01:55:45,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:45,005 INFO L87 Difference]: Start difference. First operand 1488 states and 5927 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:45,056 INFO L93 Difference]: Finished difference Result 3083 states and 11421 transitions. [2021-05-22 01:55:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:45,062 INFO L225 Difference]: With dead ends: 3083 [2021-05-22 01:55:45,062 INFO L226 Difference]: Without dead ends: 2829 [2021-05-22 01:55:45,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-05-22 01:55:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 1456. [2021-05-22 01:55:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.9855670103092784) internal successors, (5799), 1455 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5799 transitions. [2021-05-22 01:55:45,097 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5799 transitions. Word has length 25 [2021-05-22 01:55:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:45,097 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5799 transitions. [2021-05-22 01:55:45,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5799 transitions. [2021-05-22 01:55:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:45,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:45,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:45,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-05-22 01:55:45,099 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:45,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:45,099 INFO L82 PathProgramCache]: Analyzing trace with hash 103647263, now seen corresponding path program 171 times [2021-05-22 01:55:45,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:45,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095281690] [2021-05-22 01:55:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:45,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:45,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095281690] [2021-05-22 01:55:45,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095281690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:45,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:45,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:45,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459922229] [2021-05-22 01:55:45,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:45,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:45,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:45,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:45,201 INFO L87 Difference]: Start difference. First operand 1456 states and 5799 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:45,269 INFO L93 Difference]: Finished difference Result 2969 states and 11015 transitions. [2021-05-22 01:55:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:45,276 INFO L225 Difference]: With dead ends: 2969 [2021-05-22 01:55:45,276 INFO L226 Difference]: Without dead ends: 2810 [2021-05-22 01:55:45,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-05-22 01:55:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1472. [2021-05-22 01:55:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9748470428280083) internal successors, (5847), 1471 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5847 transitions. [2021-05-22 01:55:45,328 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5847 transitions. Word has length 25 [2021-05-22 01:55:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:45,328 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5847 transitions. [2021-05-22 01:55:45,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5847 transitions. [2021-05-22 01:55:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:45,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:45,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:45,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-05-22 01:55:45,331 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:45,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1111945247, now seen corresponding path program 172 times [2021-05-22 01:55:45,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:45,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219361594] [2021-05-22 01:55:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:45,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219361594] [2021-05-22 01:55:45,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219361594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:45,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:45,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:45,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131051444] [2021-05-22 01:55:45,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:45,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:45,426 INFO L87 Difference]: Start difference. First operand 1472 states and 5847 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:45,490 INFO L93 Difference]: Finished difference Result 2997 states and 11103 transitions. [2021-05-22 01:55:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:45,495 INFO L225 Difference]: With dead ends: 2997 [2021-05-22 01:55:45,496 INFO L226 Difference]: Without dead ends: 2794 [2021-05-22 01:55:45,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-05-22 01:55:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1456. [2021-05-22 01:55:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.980068728522337) internal successors, (5791), 1455 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5791 transitions. [2021-05-22 01:55:45,531 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5791 transitions. Word has length 25 [2021-05-22 01:55:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:45,532 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5791 transitions. [2021-05-22 01:55:45,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5791 transitions. [2021-05-22 01:55:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:45,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:45,533 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:45,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-05-22 01:55:45,534 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1494775777, now seen corresponding path program 173 times [2021-05-22 01:55:45,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:45,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817351196] [2021-05-22 01:55:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:45,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817351196] [2021-05-22 01:55:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817351196] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:45,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:45,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:45,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395067613] [2021-05-22 01:55:45,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:45,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:45,615 INFO L87 Difference]: Start difference. First operand 1456 states and 5791 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:45,676 INFO L93 Difference]: Finished difference Result 3090 states and 11457 transitions. [2021-05-22 01:55:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:45,682 INFO L225 Difference]: With dead ends: 3090 [2021-05-22 01:55:45,682 INFO L226 Difference]: Without dead ends: 2903 [2021-05-22 01:55:45,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-05-22 01:55:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 1502. [2021-05-22 01:55:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.9626915389740174) internal successors, (5948), 1501 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5948 transitions. [2021-05-22 01:55:45,719 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5948 transitions. Word has length 25 [2021-05-22 01:55:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:45,719 INFO L482 AbstractCegarLoop]: Abstraction has 1502 states and 5948 transitions. [2021-05-22 01:55:45,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5948 transitions. [2021-05-22 01:55:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:45,721 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:45,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:45,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-05-22 01:55:45,722 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:45,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1847915267, now seen corresponding path program 174 times [2021-05-22 01:55:45,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:45,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92629] [2021-05-22 01:55:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:45,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:45,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92629] [2021-05-22 01:55:45,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:45,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:45,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:45,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610487288] [2021-05-22 01:55:45,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:45,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:45,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:45,804 INFO L87 Difference]: Start difference. First operand 1502 states and 5948 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:45,854 INFO L93 Difference]: Finished difference Result 3125 states and 11546 transitions. [2021-05-22 01:55:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:45,860 INFO L225 Difference]: With dead ends: 3125 [2021-05-22 01:55:45,860 INFO L226 Difference]: Without dead ends: 2841 [2021-05-22 01:55:45,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-05-22 01:55:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1440. [2021-05-22 01:55:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.985406532314107) internal successors, (5735), 1439 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5735 transitions. [2021-05-22 01:55:45,896 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5735 transitions. Word has length 25 [2021-05-22 01:55:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:45,896 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5735 transitions. [2021-05-22 01:55:45,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5735 transitions. [2021-05-22 01:55:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:45,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:45,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:45,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-05-22 01:55:45,898 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:45,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:45,898 INFO L82 PathProgramCache]: Analyzing trace with hash 515731295, now seen corresponding path program 175 times [2021-05-22 01:55:45,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:45,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107889929] [2021-05-22 01:55:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:45,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:45,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107889929] [2021-05-22 01:55:45,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107889929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:45,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:45,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:45,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665129897] [2021-05-22 01:55:45,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:45,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:45,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:45,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:45,989 INFO L87 Difference]: Start difference. First operand 1440 states and 5735 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:46,039 INFO L93 Difference]: Finished difference Result 2970 states and 11015 transitions. [2021-05-22 01:55:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:46,045 INFO L225 Difference]: With dead ends: 2970 [2021-05-22 01:55:46,045 INFO L226 Difference]: Without dead ends: 2811 [2021-05-22 01:55:46,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-05-22 01:55:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1488. [2021-05-22 01:55:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.980497646267653) internal successors, (5919), 1487 states have internal predecessors, (5919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5919 transitions. [2021-05-22 01:55:46,081 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5919 transitions. Word has length 25 [2021-05-22 01:55:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:46,081 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 5919 transitions. [2021-05-22 01:55:46,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5919 transitions. [2021-05-22 01:55:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:46,083 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:46,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:46,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-05-22 01:55:46,083 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash -492566689, now seen corresponding path program 176 times [2021-05-22 01:55:46,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:46,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920744174] [2021-05-22 01:55:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:46,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:46,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920744174] [2021-05-22 01:55:46,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920744174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:46,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:46,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640986821] [2021-05-22 01:55:46,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:46,176 INFO L87 Difference]: Start difference. First operand 1488 states and 5919 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:46,252 INFO L93 Difference]: Finished difference Result 3033 states and 11222 transitions. [2021-05-22 01:55:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:46,258 INFO L225 Difference]: With dead ends: 3033 [2021-05-22 01:55:46,258 INFO L226 Difference]: Without dead ends: 2779 [2021-05-22 01:55:46,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-05-22 01:55:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 1456. [2021-05-22 01:55:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.980068728522337) internal successors, (5791), 1455 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5791 transitions. [2021-05-22 01:55:46,294 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5791 transitions. Word has length 25 [2021-05-22 01:55:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:46,294 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5791 transitions. [2021-05-22 01:55:46,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5791 transitions. [2021-05-22 01:55:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:46,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:46,296 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:46,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-05-22 01:55:46,296 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1556289311, now seen corresponding path program 177 times [2021-05-22 01:55:46,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:46,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378126819] [2021-05-22 01:55:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:46,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:46,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378126819] [2021-05-22 01:55:46,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378126819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:46,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:46,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:46,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381093177] [2021-05-22 01:55:46,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:46,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:46,382 INFO L87 Difference]: Start difference. First operand 1456 states and 5791 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:46,433 INFO L93 Difference]: Finished difference Result 2875 states and 10664 transitions. [2021-05-22 01:55:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:46,439 INFO L225 Difference]: With dead ends: 2875 [2021-05-22 01:55:46,439 INFO L226 Difference]: Without dead ends: 2716 [2021-05-22 01:55:46,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-05-22 01:55:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 1472. [2021-05-22 01:55:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9694085656016314) internal successors, (5839), 1471 states have internal predecessors, (5839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5839 transitions. [2021-05-22 01:55:46,476 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5839 transitions. Word has length 25 [2021-05-22 01:55:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:46,476 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5839 transitions. [2021-05-22 01:55:46,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5839 transitions. [2021-05-22 01:55:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:46,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:46,478 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:46,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-05-22 01:55:46,478 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash -385982689, now seen corresponding path program 178 times [2021-05-22 01:55:46,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:46,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119382306] [2021-05-22 01:55:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:46,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119382306] [2021-05-22 01:55:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119382306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:46,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:46,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:46,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778351440] [2021-05-22 01:55:46,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:46,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:46,566 INFO L87 Difference]: Start difference. First operand 1472 states and 5839 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:46,629 INFO L93 Difference]: Finished difference Result 2763 states and 10327 transitions. [2021-05-22 01:55:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:46,634 INFO L225 Difference]: With dead ends: 2763 [2021-05-22 01:55:46,634 INFO L226 Difference]: Without dead ends: 2572 [2021-05-22 01:55:46,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-05-22 01:55:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1456. [2021-05-22 01:55:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.9745704467353953) internal successors, (5783), 1455 states have internal predecessors, (5783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5783 transitions. [2021-05-22 01:55:46,669 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5783 transitions. Word has length 25 [2021-05-22 01:55:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:46,669 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5783 transitions. [2021-05-22 01:55:46,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5783 transitions. [2021-05-22 01:55:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:46,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:46,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:46,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-05-22 01:55:46,671 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1302263583, now seen corresponding path program 179 times [2021-05-22 01:55:46,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:46,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166555006] [2021-05-22 01:55:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:46,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:46,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166555006] [2021-05-22 01:55:46,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166555006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:46,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:46,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:46,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588660308] [2021-05-22 01:55:46,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:46,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:46,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:46,770 INFO L87 Difference]: Start difference. First operand 1456 states and 5783 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:46,836 INFO L93 Difference]: Finished difference Result 3010 states and 11155 transitions. [2021-05-22 01:55:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:46,842 INFO L225 Difference]: With dead ends: 3010 [2021-05-22 01:55:46,842 INFO L226 Difference]: Without dead ends: 2835 [2021-05-22 01:55:46,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-05-22 01:55:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1496. [2021-05-22 01:55:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.9618729096989966) internal successors, (5923), 1495 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5923 transitions. [2021-05-22 01:55:46,879 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5923 transitions. Word has length 25 [2021-05-22 01:55:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:46,879 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5923 transitions. [2021-05-22 01:55:46,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5923 transitions. [2021-05-22 01:55:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:46,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:46,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:46,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-05-22 01:55:46,881 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash -353260803, now seen corresponding path program 180 times [2021-05-22 01:55:46,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:46,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138290300] [2021-05-22 01:55:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:46,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:46,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138290300] [2021-05-22 01:55:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138290300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:46,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:46,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146963371] [2021-05-22 01:55:46,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:46,984 INFO L87 Difference]: Start difference. First operand 1496 states and 5923 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:47,034 INFO L93 Difference]: Finished difference Result 2962 states and 10955 transitions. [2021-05-22 01:55:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:47,039 INFO L225 Difference]: With dead ends: 2962 [2021-05-22 01:55:47,039 INFO L226 Difference]: Without dead ends: 2684 [2021-05-22 01:55:47,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-05-22 01:55:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1440. [2021-05-22 01:55:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.9798471160528144) internal successors, (5727), 1439 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5727 transitions. [2021-05-22 01:55:47,075 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5727 transitions. Word has length 25 [2021-05-22 01:55:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:47,075 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5727 transitions. [2021-05-22 01:55:47,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5727 transitions. [2021-05-22 01:55:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:47,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:47,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:47,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-05-22 01:55:47,077 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash -645911871, now seen corresponding path program 181 times [2021-05-22 01:55:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062841800] [2021-05-22 01:55:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:47,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:47,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062841800] [2021-05-22 01:55:47,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062841800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:47,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:47,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:47,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158230625] [2021-05-22 01:55:47,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:47,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:47,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:47,188 INFO L87 Difference]: Start difference. First operand 1440 states and 5727 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:47,257 INFO L93 Difference]: Finished difference Result 2860 states and 10605 transitions. [2021-05-22 01:55:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:47,262 INFO L225 Difference]: With dead ends: 2860 [2021-05-22 01:55:47,263 INFO L226 Difference]: Without dead ends: 2701 [2021-05-22 01:55:47,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-05-22 01:55:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1464. [2021-05-22 01:55:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.971975393028025) internal successors, (5811), 1463 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5811 transitions. [2021-05-22 01:55:47,299 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5811 transitions. Word has length 25 [2021-05-22 01:55:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:47,299 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 5811 transitions. [2021-05-22 01:55:47,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5811 transitions. [2021-05-22 01:55:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:47,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:47,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:47,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-05-22 01:55:47,301 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:47,301 INFO L82 PathProgramCache]: Analyzing trace with hash 362386113, now seen corresponding path program 182 times [2021-05-22 01:55:47,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:47,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118814956] [2021-05-22 01:55:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:47,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:47,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118814956] [2021-05-22 01:55:47,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118814956] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:47,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:47,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:47,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848158845] [2021-05-22 01:55:47,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:47,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:47,387 INFO L87 Difference]: Start difference. First operand 1464 states and 5811 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:47,458 INFO L93 Difference]: Finished difference Result 2888 states and 10693 transitions. [2021-05-22 01:55:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:47,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:47,464 INFO L225 Difference]: With dead ends: 2888 [2021-05-22 01:55:47,464 INFO L226 Difference]: Without dead ends: 2685 [2021-05-22 01:55:47,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-05-22 01:55:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1448. [2021-05-22 01:55:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.977194194885971) internal successors, (5755), 1447 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5755 transitions. [2021-05-22 01:55:47,499 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5755 transitions. Word has length 25 [2021-05-22 01:55:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:47,499 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5755 transitions. [2021-05-22 01:55:47,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5755 transitions. [2021-05-22 01:55:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:47,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:47,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:47,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-05-22 01:55:47,502 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1532975775, now seen corresponding path program 183 times [2021-05-22 01:55:47,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:47,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195254965] [2021-05-22 01:55:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:47,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:47,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195254965] [2021-05-22 01:55:47,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195254965] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:47,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:47,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786420601] [2021-05-22 01:55:47,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:47,579 INFO L87 Difference]: Start difference. First operand 1448 states and 5755 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:47,630 INFO L93 Difference]: Finished difference Result 2816 states and 10445 transitions. [2021-05-22 01:55:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:47,635 INFO L225 Difference]: With dead ends: 2816 [2021-05-22 01:55:47,635 INFO L226 Difference]: Without dead ends: 2657 [2021-05-22 01:55:47,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-05-22 01:55:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1464. [2021-05-22 01:55:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.9665071770334928) internal successors, (5803), 1463 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5803 transitions. [2021-05-22 01:55:47,669 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5803 transitions. Word has length 25 [2021-05-22 01:55:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:47,669 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 5803 transitions. [2021-05-22 01:55:47,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5803 transitions. [2021-05-22 01:55:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:47,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:47,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:47,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-05-22 01:55:47,671 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:47,671 INFO L82 PathProgramCache]: Analyzing trace with hash 887444161, now seen corresponding path program 184 times [2021-05-22 01:55:47,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:47,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401159399] [2021-05-22 01:55:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:47,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:47,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401159399] [2021-05-22 01:55:47,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401159399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:47,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:47,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:47,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416144210] [2021-05-22 01:55:47,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:47,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:47,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:47,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:47,748 INFO L87 Difference]: Start difference. First operand 1464 states and 5803 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:47,810 INFO L93 Difference]: Finished difference Result 2704 states and 10108 transitions. [2021-05-22 01:55:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:47,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:47,816 INFO L225 Difference]: With dead ends: 2704 [2021-05-22 01:55:47,816 INFO L226 Difference]: Without dead ends: 2513 [2021-05-22 01:55:47,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-05-22 01:55:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1448. [2021-05-22 01:55:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9716655148583278) internal successors, (5747), 1447 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5747 transitions. [2021-05-22 01:55:47,850 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5747 transitions. Word has length 25 [2021-05-22 01:55:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:47,850 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5747 transitions. [2021-05-22 01:55:47,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5747 transitions. [2021-05-22 01:55:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:47,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:47,852 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:47,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-05-22 01:55:47,852 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2145199423, now seen corresponding path program 185 times [2021-05-22 01:55:47,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:47,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495387744] [2021-05-22 01:55:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:47,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:47,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495387744] [2021-05-22 01:55:47,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495387744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:47,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:47,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:47,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593786404] [2021-05-22 01:55:47,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:47,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:47,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:47,932 INFO L87 Difference]: Start difference. First operand 1448 states and 5747 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:47,994 INFO L93 Difference]: Finished difference Result 2852 states and 10577 transitions. [2021-05-22 01:55:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:47,999 INFO L225 Difference]: With dead ends: 2852 [2021-05-22 01:55:47,999 INFO L226 Difference]: Without dead ends: 2665 [2021-05-22 01:55:47,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-05-22 01:55:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1472. [2021-05-22 01:55:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9585316111488784) internal successors, (5823), 1471 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5823 transitions. [2021-05-22 01:55:48,044 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5823 transitions. Word has length 25 [2021-05-22 01:55:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:48,044 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5823 transitions. [2021-05-22 01:55:48,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5823 transitions. [2021-05-22 01:55:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:48,046 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:48,046 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:48,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-05-22 01:55:48,047 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash 757623327, now seen corresponding path program 186 times [2021-05-22 01:55:48,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:48,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488768579] [2021-05-22 01:55:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:48,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:48,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488768579] [2021-05-22 01:55:48,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488768579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:48,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:48,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:48,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399021533] [2021-05-22 01:55:48,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:48,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:48,121 INFO L87 Difference]: Start difference. First operand 1472 states and 5823 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:48,185 INFO L93 Difference]: Finished difference Result 2712 states and 10128 transitions. [2021-05-22 01:55:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:48,190 INFO L225 Difference]: With dead ends: 2712 [2021-05-22 01:55:48,190 INFO L226 Difference]: Without dead ends: 2505 [2021-05-22 01:55:48,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-05-22 01:55:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 1440. [2021-05-22 01:55:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.977067407922168) internal successors, (5723), 1439 states have internal predecessors, (5723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5723 transitions. [2021-05-22 01:55:48,223 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5723 transitions. Word has length 25 [2021-05-22 01:55:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:48,223 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5723 transitions. [2021-05-22 01:55:48,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5723 transitions. [2021-05-22 01:55:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:48,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:48,225 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:48,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-05-22 01:55:48,225 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1056797377, now seen corresponding path program 187 times [2021-05-22 01:55:48,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:48,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005822910] [2021-05-22 01:55:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:48,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:48,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005822910] [2021-05-22 01:55:48,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005822910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:48,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:48,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141333963] [2021-05-22 01:55:48,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:48,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:48,301 INFO L87 Difference]: Start difference. First operand 1440 states and 5723 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:48,364 INFO L93 Difference]: Finished difference Result 3057 states and 11371 transitions. [2021-05-22 01:55:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:48,371 INFO L225 Difference]: With dead ends: 3057 [2021-05-22 01:55:48,371 INFO L226 Difference]: Without dead ends: 2870 [2021-05-22 01:55:48,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-05-22 01:55:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1484. [2021-05-22 01:55:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.9723533378287255) internal successors, (5891), 1483 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5891 transitions. [2021-05-22 01:55:48,413 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5891 transitions. Word has length 25 [2021-05-22 01:55:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:48,413 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 5891 transitions. [2021-05-22 01:55:48,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5891 transitions. [2021-05-22 01:55:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:48,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:48,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:48,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-05-22 01:55:48,416 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -335347169, now seen corresponding path program 188 times [2021-05-22 01:55:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:48,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065776817] [2021-05-22 01:55:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:48,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:48,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065776817] [2021-05-22 01:55:48,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065776817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:48,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:48,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:48,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448998951] [2021-05-22 01:55:48,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:48,491 INFO L87 Difference]: Start difference. First operand 1484 states and 5891 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:48,552 INFO L93 Difference]: Finished difference Result 3045 states and 11307 transitions. [2021-05-22 01:55:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:48,558 INFO L225 Difference]: With dead ends: 3045 [2021-05-22 01:55:48,558 INFO L226 Difference]: Without dead ends: 2846 [2021-05-22 01:55:48,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-05-22 01:55:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1460. [2021-05-22 01:55:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.977381768334476) internal successors, (5803), 1459 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5803 transitions. [2021-05-22 01:55:48,593 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5803 transitions. Word has length 25 [2021-05-22 01:55:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:48,593 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5803 transitions. [2021-05-22 01:55:48,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5803 transitions. [2021-05-22 01:55:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:48,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:48,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:48,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-05-22 01:55:48,595 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -764238049, now seen corresponding path program 189 times [2021-05-22 01:55:48,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:48,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652413113] [2021-05-22 01:55:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:48,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652413113] [2021-05-22 01:55:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652413113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:48,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:48,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:48,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973241337] [2021-05-22 01:55:48,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:48,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:48,670 INFO L87 Difference]: Start difference. First operand 1460 states and 5803 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:48,734 INFO L93 Difference]: Finished difference Result 3080 states and 11418 transitions. [2021-05-22 01:55:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:48,740 INFO L225 Difference]: With dead ends: 3080 [2021-05-22 01:55:48,740 INFO L226 Difference]: Without dead ends: 2893 [2021-05-22 01:55:48,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-05-22 01:55:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1506. [2021-05-22 01:55:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.9601328903654487) internal successors, (5960), 1505 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5960 transitions. [2021-05-22 01:55:48,776 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5960 transitions. Word has length 25 [2021-05-22 01:55:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:48,776 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5960 transitions. [2021-05-22 01:55:48,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5960 transitions. [2021-05-22 01:55:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:48,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:48,778 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:48,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-05-22 01:55:48,778 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash 604522399, now seen corresponding path program 190 times [2021-05-22 01:55:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:48,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131295987] [2021-05-22 01:55:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:48,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:48,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131295987] [2021-05-22 01:55:48,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131295987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:48,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:48,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:48,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051381263] [2021-05-22 01:55:48,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:48,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:48,860 INFO L87 Difference]: Start difference. First operand 1506 states and 5960 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:48,931 INFO L93 Difference]: Finished difference Result 3115 states and 11507 transitions. [2021-05-22 01:55:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:48,936 INFO L225 Difference]: With dead ends: 3115 [2021-05-22 01:55:48,937 INFO L226 Difference]: Without dead ends: 2847 [2021-05-22 01:55:48,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-05-22 01:55:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1460. [2021-05-22 01:55:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.9636737491432488) internal successors, (5783), 1459 states have internal predecessors, (5783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5783 transitions. [2021-05-22 01:55:48,972 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5783 transitions. Word has length 25 [2021-05-22 01:55:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:48,972 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5783 transitions. [2021-05-22 01:55:48,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5783 transitions. [2021-05-22 01:55:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:48,974 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:48,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:48,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-05-22 01:55:48,974 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash -399980675, now seen corresponding path program 191 times [2021-05-22 01:55:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:48,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973647306] [2021-05-22 01:55:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:49,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:49,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973647306] [2021-05-22 01:55:49,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973647306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:49,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:49,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:49,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609965403] [2021-05-22 01:55:49,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:49,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:49,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:49,065 INFO L87 Difference]: Start difference. First operand 1460 states and 5783 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:49,126 INFO L93 Difference]: Finished difference Result 3050 states and 11295 transitions. [2021-05-22 01:55:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:49,131 INFO L225 Difference]: With dead ends: 3050 [2021-05-22 01:55:49,131 INFO L226 Difference]: Without dead ends: 2875 [2021-05-22 01:55:49,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-05-22 01:55:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1500. [2021-05-22 01:55:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.95130086724483) internal successors, (5923), 1499 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5923 transitions. [2021-05-22 01:55:49,168 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5923 transitions. Word has length 25 [2021-05-22 01:55:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:49,168 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 5923 transitions. [2021-05-22 01:55:49,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5923 transitions. [2021-05-22 01:55:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:49,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:49,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:49,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-05-22 01:55:49,170 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:49,171 INFO L82 PathProgramCache]: Analyzing trace with hash -181629089, now seen corresponding path program 192 times [2021-05-22 01:55:49,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:49,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205780630] [2021-05-22 01:55:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:49,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:49,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205780630] [2021-05-22 01:55:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205780630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:49,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:49,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327757021] [2021-05-22 01:55:49,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:49,265 INFO L87 Difference]: Start difference. First operand 1500 states and 5923 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:49,320 INFO L93 Difference]: Finished difference Result 3002 states and 11095 transitions. [2021-05-22 01:55:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:49,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:49,326 INFO L225 Difference]: With dead ends: 3002 [2021-05-22 01:55:49,326 INFO L226 Difference]: Without dead ends: 2712 [2021-05-22 01:55:49,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-22 01:55:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 1432. [2021-05-22 01:55:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.9825296995108315) internal successors, (5699), 1431 states have internal predecessors, (5699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5699 transitions. [2021-05-22 01:55:49,361 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5699 transitions. Word has length 25 [2021-05-22 01:55:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:49,362 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5699 transitions. [2021-05-22 01:55:49,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5699 transitions. [2021-05-22 01:55:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:49,363 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:49,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:49,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-05-22 01:55:49,364 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:49,364 INFO L82 PathProgramCache]: Analyzing trace with hash 498166553, now seen corresponding path program 193 times [2021-05-22 01:55:49,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:49,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002616142] [2021-05-22 01:55:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:49,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:49,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002616142] [2021-05-22 01:55:49,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002616142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:49,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:49,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:49,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003057485] [2021-05-22 01:55:49,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:49,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:49,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:49,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:49,452 INFO L87 Difference]: Start difference. First operand 1432 states and 5699 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:49,502 INFO L93 Difference]: Finished difference Result 2797 states and 10356 transitions. [2021-05-22 01:55:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:49,507 INFO L225 Difference]: With dead ends: 2797 [2021-05-22 01:55:49,508 INFO L226 Difference]: Without dead ends: 2638 [2021-05-22 01:55:49,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-05-22 01:55:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 1460. [2021-05-22 01:55:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.977381768334476) internal successors, (5803), 1459 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5803 transitions. [2021-05-22 01:55:49,541 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5803 transitions. Word has length 25 [2021-05-22 01:55:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:49,541 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5803 transitions. [2021-05-22 01:55:49,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5803 transitions. [2021-05-22 01:55:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:49,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:49,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:49,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-05-22 01:55:49,543 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:49,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1091768197, now seen corresponding path program 194 times [2021-05-22 01:55:49,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:49,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107571545] [2021-05-22 01:55:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:49,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107571545] [2021-05-22 01:55:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107571545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:49,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:49,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355262609] [2021-05-22 01:55:49,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:49,632 INFO L87 Difference]: Start difference. First operand 1460 states and 5803 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:49,713 INFO L93 Difference]: Finished difference Result 2827 states and 10449 transitions. [2021-05-22 01:55:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:49,718 INFO L225 Difference]: With dead ends: 2827 [2021-05-22 01:55:49,719 INFO L226 Difference]: Without dead ends: 2622 [2021-05-22 01:55:49,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-05-22 01:55:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1444. [2021-05-22 01:55:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9826749826749825) internal successors, (5747), 1443 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5747 transitions. [2021-05-22 01:55:49,778 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5747 transitions. Word has length 25 [2021-05-22 01:55:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:49,778 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5747 transitions. [2021-05-22 01:55:49,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5747 transitions. [2021-05-22 01:55:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:49,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:49,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:49,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-05-22 01:55:49,780 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1579229179, now seen corresponding path program 195 times [2021-05-22 01:55:49,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:49,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092820505] [2021-05-22 01:55:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:49,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092820505] [2021-05-22 01:55:49,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092820505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:49,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:49,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:49,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279147361] [2021-05-22 01:55:49,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:49,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:49,879 INFO L87 Difference]: Start difference. First operand 1444 states and 5747 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:49,934 INFO L93 Difference]: Finished difference Result 2795 states and 10343 transitions. [2021-05-22 01:55:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:49,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:49,940 INFO L225 Difference]: With dead ends: 2795 [2021-05-22 01:55:49,940 INFO L226 Difference]: Without dead ends: 2636 [2021-05-22 01:55:49,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-05-22 01:55:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1460. [2021-05-22 01:55:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.971898560657985) internal successors, (5795), 1459 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5795 transitions. [2021-05-22 01:55:49,973 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5795 transitions. Word has length 25 [2021-05-22 01:55:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:49,973 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5795 transitions. [2021-05-22 01:55:49,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5795 transitions. [2021-05-22 01:55:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:49,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:49,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:49,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-05-22 01:55:49,975 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1707440133, now seen corresponding path program 196 times [2021-05-22 01:55:49,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:49,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930246708] [2021-05-22 01:55:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:50,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:50,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930246708] [2021-05-22 01:55:50,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930246708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:50,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:50,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586542849] [2021-05-22 01:55:50,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:50,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:50,065 INFO L87 Difference]: Start difference. First operand 1460 states and 5795 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:50,127 INFO L93 Difference]: Finished difference Result 2823 states and 10431 transitions. [2021-05-22 01:55:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:50,132 INFO L225 Difference]: With dead ends: 2823 [2021-05-22 01:55:50,132 INFO L226 Difference]: Without dead ends: 2620 [2021-05-22 01:55:50,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-05-22 01:55:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1444. [2021-05-22 01:55:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9771309771309773) internal successors, (5739), 1443 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5739 transitions. [2021-05-22 01:55:50,165 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5739 transitions. Word has length 25 [2021-05-22 01:55:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:50,165 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5739 transitions. [2021-05-22 01:55:50,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5739 transitions. [2021-05-22 01:55:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:50,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:50,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:50,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-05-22 01:55:50,167 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1298576163, now seen corresponding path program 197 times [2021-05-22 01:55:50,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:50,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028519570] [2021-05-22 01:55:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:50,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:50,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028519570] [2021-05-22 01:55:50,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028519570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:50,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:50,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:50,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787529121] [2021-05-22 01:55:50,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:50,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:50,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:50,264 INFO L87 Difference]: Start difference. First operand 1444 states and 5739 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:50,327 INFO L93 Difference]: Finished difference Result 2869 states and 10612 transitions. [2021-05-22 01:55:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:50,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:50,333 INFO L225 Difference]: With dead ends: 2869 [2021-05-22 01:55:50,333 INFO L226 Difference]: Without dead ends: 2680 [2021-05-22 01:55:50,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-22 01:55:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1474. [2021-05-22 01:55:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.9592668024439917) internal successors, (5832), 1473 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5832 transitions. [2021-05-22 01:55:50,367 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5832 transitions. Word has length 25 [2021-05-22 01:55:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:50,367 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5832 transitions. [2021-05-22 01:55:50,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5832 transitions. [2021-05-22 01:55:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:50,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:50,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:50,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-05-22 01:55:50,369 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 953054139, now seen corresponding path program 198 times [2021-05-22 01:55:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:50,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605693743] [2021-05-22 01:55:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:50,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605693743] [2021-05-22 01:55:50,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605693743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:50,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:50,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574985799] [2021-05-22 01:55:50,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:50,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:50,451 INFO L87 Difference]: Start difference. First operand 1474 states and 5832 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:50,513 INFO L93 Difference]: Finished difference Result 2867 states and 10577 transitions. [2021-05-22 01:55:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:50,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:50,519 INFO L225 Difference]: With dead ends: 2867 [2021-05-22 01:55:50,519 INFO L226 Difference]: Without dead ends: 2642 [2021-05-22 01:55:50,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-05-22 01:55:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1436. [2021-05-22 01:55:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.9825783972125435) internal successors, (5715), 1435 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5715 transitions. [2021-05-22 01:55:50,553 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5715 transitions. Word has length 25 [2021-05-22 01:55:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:50,553 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 5715 transitions. [2021-05-22 01:55:50,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5715 transitions. [2021-05-22 01:55:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:50,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:50,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:50,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-05-22 01:55:50,555 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash -675793157, now seen corresponding path program 199 times [2021-05-22 01:55:50,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:50,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738389210] [2021-05-22 01:55:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:50,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:50,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738389210] [2021-05-22 01:55:50,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738389210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:50,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:50,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:50,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832797275] [2021-05-22 01:55:50,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:50,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:50,646 INFO L87 Difference]: Start difference. First operand 1436 states and 5715 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:50,697 INFO L93 Difference]: Finished difference Result 2763 states and 10225 transitions. [2021-05-22 01:55:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:50,702 INFO L225 Difference]: With dead ends: 2763 [2021-05-22 01:55:50,702 INFO L226 Difference]: Without dead ends: 2604 [2021-05-22 01:55:50,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-05-22 01:55:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1460. [2021-05-22 01:55:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.9746401644962304) internal successors, (5799), 1459 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5799 transitions. [2021-05-22 01:55:50,736 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5799 transitions. Word has length 25 [2021-05-22 01:55:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:50,736 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5799 transitions. [2021-05-22 01:55:50,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5799 transitions. [2021-05-22 01:55:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:50,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:50,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:50,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-05-22 01:55:50,738 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:50,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2029239389, now seen corresponding path program 200 times [2021-05-22 01:55:50,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:50,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448136539] [2021-05-22 01:55:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:50,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448136539] [2021-05-22 01:55:50,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448136539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:50,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:50,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:50,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127739915] [2021-05-22 01:55:50,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:50,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:50,836 INFO L87 Difference]: Start difference. First operand 1460 states and 5799 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:50,903 INFO L93 Difference]: Finished difference Result 2793 states and 10318 transitions. [2021-05-22 01:55:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:50,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:50,908 INFO L225 Difference]: With dead ends: 2793 [2021-05-22 01:55:50,908 INFO L226 Difference]: Without dead ends: 2588 [2021-05-22 01:55:50,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-05-22 01:55:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1444. [2021-05-22 01:55:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9799029799029797) internal successors, (5743), 1443 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5743 transitions. [2021-05-22 01:55:50,942 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5743 transitions. Word has length 25 [2021-05-22 01:55:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:50,942 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5743 transitions. [2021-05-22 01:55:50,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5743 transitions. [2021-05-22 01:55:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:50,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:50,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:50,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-05-22 01:55:50,945 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -626225413, now seen corresponding path program 201 times [2021-05-22 01:55:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:50,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135320379] [2021-05-22 01:55:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:51,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:51,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135320379] [2021-05-22 01:55:51,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135320379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:51,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:51,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819568907] [2021-05-22 01:55:51,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:51,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:51,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:51,029 INFO L87 Difference]: Start difference. First operand 1444 states and 5743 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:51,080 INFO L93 Difference]: Finished difference Result 2717 states and 10060 transitions. [2021-05-22 01:55:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:51,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:51,085 INFO L225 Difference]: With dead ends: 2717 [2021-05-22 01:55:51,085 INFO L226 Difference]: Without dead ends: 2558 [2021-05-22 01:55:51,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-05-22 01:55:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1460. [2021-05-22 01:55:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.9691569568197393) internal successors, (5791), 1459 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5791 transitions. [2021-05-22 01:55:51,119 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5791 transitions. Word has length 25 [2021-05-22 01:55:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:51,119 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5791 transitions. [2021-05-22 01:55:51,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5791 transitions. [2021-05-22 01:55:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:51,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:51,121 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:51,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-05-22 01:55:51,121 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1726469883, now seen corresponding path program 202 times [2021-05-22 01:55:51,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:51,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701666647] [2021-05-22 01:55:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:51,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:51,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701666647] [2021-05-22 01:55:51,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701666647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:51,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:51,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:51,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492448991] [2021-05-22 01:55:51,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:51,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:51,205 INFO L87 Difference]: Start difference. First operand 1460 states and 5791 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:51,269 INFO L93 Difference]: Finished difference Result 2605 states and 9723 transitions. [2021-05-22 01:55:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:51,274 INFO L225 Difference]: With dead ends: 2605 [2021-05-22 01:55:51,274 INFO L226 Difference]: Without dead ends: 2414 [2021-05-22 01:55:51,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-05-22 01:55:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1444. [2021-05-22 01:55:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9743589743589745) internal successors, (5735), 1443 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5735 transitions. [2021-05-22 01:55:51,306 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5735 transitions. Word has length 25 [2021-05-22 01:55:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:51,306 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5735 transitions. [2021-05-22 01:55:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5735 transitions. [2021-05-22 01:55:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:51,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:51,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-05-22 01:55:51,308 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash 790936541, now seen corresponding path program 203 times [2021-05-22 01:55:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:51,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340957891] [2021-05-22 01:55:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:51,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340957891] [2021-05-22 01:55:51,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340957891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:51,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:51,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:51,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616636549] [2021-05-22 01:55:51,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:51,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:51,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:51,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:51,401 INFO L87 Difference]: Start difference. First operand 1444 states and 5735 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:51,465 INFO L93 Difference]: Finished difference Result 2755 states and 10197 transitions. [2021-05-22 01:55:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:51,470 INFO L225 Difference]: With dead ends: 2755 [2021-05-22 01:55:51,470 INFO L226 Difference]: Without dead ends: 2566 [2021-05-22 01:55:51,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-05-22 01:55:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1468. [2021-05-22 01:55:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.9611451942740286) internal successors, (5811), 1467 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5811 transitions. [2021-05-22 01:55:51,503 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5811 transitions. Word has length 25 [2021-05-22 01:55:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:51,503 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 5811 transitions. [2021-05-22 01:55:51,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5811 transitions. [2021-05-22 01:55:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:51,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:51,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:51,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-05-22 01:55:51,505 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 49984443, now seen corresponding path program 204 times [2021-05-22 01:55:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:51,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683208464] [2021-05-22 01:55:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:51,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:51,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683208464] [2021-05-22 01:55:51,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683208464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:51,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:51,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:51,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536383567] [2021-05-22 01:55:51,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:51,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:51,622 INFO L87 Difference]: Start difference. First operand 1468 states and 5811 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:51,691 INFO L93 Difference]: Finished difference Result 2613 states and 9743 transitions. [2021-05-22 01:55:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:51,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:51,698 INFO L225 Difference]: With dead ends: 2613 [2021-05-22 01:55:51,698 INFO L226 Difference]: Without dead ends: 2406 [2021-05-22 01:55:51,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-05-22 01:55:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1436. [2021-05-22 01:55:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.9797909407665504) internal successors, (5711), 1435 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5711 transitions. [2021-05-22 01:55:51,740 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5711 transitions. Word has length 25 [2021-05-22 01:55:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:51,740 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 5711 transitions. [2021-05-22 01:55:51,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5711 transitions. [2021-05-22 01:55:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:51,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:51,742 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:51,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-05-22 01:55:51,742 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:51,742 INFO L82 PathProgramCache]: Analyzing trace with hash -287788195, now seen corresponding path program 205 times [2021-05-22 01:55:51,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:51,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715383116] [2021-05-22 01:55:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:51,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:51,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715383116] [2021-05-22 01:55:51,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715383116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:51,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:51,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999808906] [2021-05-22 01:55:51,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:51,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:51,838 INFO L87 Difference]: Start difference. First operand 1436 states and 5711 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:51,899 INFO L93 Difference]: Finished difference Result 2759 states and 10211 transitions. [2021-05-22 01:55:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:51,904 INFO L225 Difference]: With dead ends: 2759 [2021-05-22 01:55:51,905 INFO L226 Difference]: Without dead ends: 2600 [2021-05-22 01:55:51,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-05-22 01:55:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1460. [2021-05-22 01:55:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.971898560657985) internal successors, (5795), 1459 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5795 transitions. [2021-05-22 01:55:51,943 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5795 transitions. Word has length 25 [2021-05-22 01:55:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:51,943 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5795 transitions. [2021-05-22 01:55:51,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5795 transitions. [2021-05-22 01:55:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:51,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:51,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:51,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-05-22 01:55:51,945 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 720509789, now seen corresponding path program 206 times [2021-05-22 01:55:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:51,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256025842] [2021-05-22 01:55:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:52,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:52,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256025842] [2021-05-22 01:55:52,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256025842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:52,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:52,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991817810] [2021-05-22 01:55:52,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:52,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:52,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:52,043 INFO L87 Difference]: Start difference. First operand 1460 states and 5795 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:52,110 INFO L93 Difference]: Finished difference Result 2787 states and 10299 transitions. [2021-05-22 01:55:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:52,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:52,116 INFO L225 Difference]: With dead ends: 2787 [2021-05-22 01:55:52,116 INFO L226 Difference]: Without dead ends: 2584 [2021-05-22 01:55:52,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-05-22 01:55:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1444. [2021-05-22 01:55:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9771309771309773) internal successors, (5739), 1443 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5739 transitions. [2021-05-22 01:55:52,155 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5739 transitions. Word has length 25 [2021-05-22 01:55:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:52,155 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5739 transitions. [2021-05-22 01:55:52,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5739 transitions. [2021-05-22 01:55:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:52,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:52,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:52,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-05-22 01:55:52,157 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1891099451, now seen corresponding path program 207 times [2021-05-22 01:55:52,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:52,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193857257] [2021-05-22 01:55:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:52,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193857257] [2021-05-22 01:55:52,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193857257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:52,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:52,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:52,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365724026] [2021-05-22 01:55:52,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:52,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:52,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:52,239 INFO L87 Difference]: Start difference. First operand 1444 states and 5739 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:52,290 INFO L93 Difference]: Finished difference Result 2715 states and 10051 transitions. [2021-05-22 01:55:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:52,295 INFO L225 Difference]: With dead ends: 2715 [2021-05-22 01:55:52,295 INFO L226 Difference]: Without dead ends: 2556 [2021-05-22 01:55:52,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-05-22 01:55:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1460. [2021-05-22 01:55:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.9664153529814943) internal successors, (5787), 1459 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5787 transitions. [2021-05-22 01:55:52,334 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5787 transitions. Word has length 25 [2021-05-22 01:55:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:52,334 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5787 transitions. [2021-05-22 01:55:52,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5787 transitions. [2021-05-22 01:55:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:52,337 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:52,337 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:52,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-05-22 01:55:52,337 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1245567837, now seen corresponding path program 208 times [2021-05-22 01:55:52,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:52,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344006933] [2021-05-22 01:55:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:52,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:52,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344006933] [2021-05-22 01:55:52,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344006933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:52,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:52,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:52,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531669475] [2021-05-22 01:55:52,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:52,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:52,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:52,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:52,413 INFO L87 Difference]: Start difference. First operand 1460 states and 5787 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:52,480 INFO L93 Difference]: Finished difference Result 2603 states and 9714 transitions. [2021-05-22 01:55:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:52,485 INFO L225 Difference]: With dead ends: 2603 [2021-05-22 01:55:52,485 INFO L226 Difference]: Without dead ends: 2412 [2021-05-22 01:55:52,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-22 01:55:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1444. [2021-05-22 01:55:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9715869715869716) internal successors, (5731), 1443 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5731 transitions. [2021-05-22 01:55:52,517 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5731 transitions. Word has length 25 [2021-05-22 01:55:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:52,517 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5731 transitions. [2021-05-22 01:55:52,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5731 transitions. [2021-05-22 01:55:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:52,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:52,519 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:52,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-05-22 01:55:52,520 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1787075747, now seen corresponding path program 209 times [2021-05-22 01:55:52,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:52,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516792055] [2021-05-22 01:55:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:52,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:52,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516792055] [2021-05-22 01:55:52,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516792055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:52,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:52,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147631447] [2021-05-22 01:55:52,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:52,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:52,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:52,593 INFO L87 Difference]: Start difference. First operand 1444 states and 5731 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:52,657 INFO L93 Difference]: Finished difference Result 2751 states and 10183 transitions. [2021-05-22 01:55:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:52,662 INFO L225 Difference]: With dead ends: 2751 [2021-05-22 01:55:52,662 INFO L226 Difference]: Without dead ends: 2564 [2021-05-22 01:55:52,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-05-22 01:55:52,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1468. [2021-05-22 01:55:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.958418541240627) internal successors, (5807), 1467 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5807 transitions. [2021-05-22 01:55:52,694 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5807 transitions. Word has length 25 [2021-05-22 01:55:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:52,694 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 5807 transitions. [2021-05-22 01:55:52,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5807 transitions. [2021-05-22 01:55:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:52,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:52,696 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:52,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-05-22 01:55:52,696 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1115747003, now seen corresponding path program 210 times [2021-05-22 01:55:52,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:52,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220230353] [2021-05-22 01:55:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:52,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:52,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220230353] [2021-05-22 01:55:52,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220230353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:52,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:52,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:52,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785452510] [2021-05-22 01:55:52,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:52,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:52,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:52,770 INFO L87 Difference]: Start difference. First operand 1468 states and 5807 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:52,833 INFO L93 Difference]: Finished difference Result 2611 states and 9734 transitions. [2021-05-22 01:55:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:52,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:52,837 INFO L225 Difference]: With dead ends: 2611 [2021-05-22 01:55:52,838 INFO L226 Difference]: Without dead ends: 2404 [2021-05-22 01:55:52,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-05-22 01:55:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1436. [2021-05-22 01:55:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.9770034843205573) internal successors, (5707), 1435 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5707 transitions. [2021-05-22 01:55:52,869 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5707 transitions. Word has length 25 [2021-05-22 01:55:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:52,869 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 5707 transitions. [2021-05-22 01:55:52,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5707 transitions. [2021-05-22 01:55:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:52,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:52,871 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:52,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-05-22 01:55:52,871 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash 436316095, now seen corresponding path program 211 times [2021-05-22 01:55:52,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:52,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916211507] [2021-05-22 01:55:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:52,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916211507] [2021-05-22 01:55:52,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916211507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:52,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:52,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379537178] [2021-05-22 01:55:52,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:52,945 INFO L87 Difference]: Start difference. First operand 1436 states and 5707 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:53,006 INFO L93 Difference]: Finished difference Result 2875 states and 10649 transitions. [2021-05-22 01:55:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:53,011 INFO L225 Difference]: With dead ends: 2875 [2021-05-22 01:55:53,011 INFO L226 Difference]: Without dead ends: 2686 [2021-05-22 01:55:53,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-05-22 01:55:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1478. [2021-05-22 01:55:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.964793500338524) internal successors, (5856), 1477 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 5856 transitions. [2021-05-22 01:55:53,045 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 5856 transitions. Word has length 25 [2021-05-22 01:55:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:53,045 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 5856 transitions. [2021-05-22 01:55:53,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 5856 transitions. [2021-05-22 01:55:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:53,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:53,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:53,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-05-22 01:55:53,047 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1607020899, now seen corresponding path program 212 times [2021-05-22 01:55:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:53,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366303571] [2021-05-22 01:55:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:53,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:53,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366303571] [2021-05-22 01:55:53,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366303571] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:53,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:53,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:53,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504659640] [2021-05-22 01:55:53,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:53,121 INFO L87 Difference]: Start difference. First operand 1478 states and 5856 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:53,180 INFO L93 Difference]: Finished difference Result 2873 states and 10614 transitions. [2021-05-22 01:55:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:53,185 INFO L225 Difference]: With dead ends: 2873 [2021-05-22 01:55:53,186 INFO L226 Difference]: Without dead ends: 2656 [2021-05-22 01:55:53,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-05-22 01:55:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 1448. [2021-05-22 01:55:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9744298548721493) internal successors, (5751), 1447 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5751 transitions. [2021-05-22 01:55:53,219 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5751 transitions. Word has length 25 [2021-05-22 01:55:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:53,219 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5751 transitions. [2021-05-22 01:55:53,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5751 transitions. [2021-05-22 01:55:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:53,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:53,221 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:53,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-05-22 01:55:53,221 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763555, now seen corresponding path program 213 times [2021-05-22 01:55:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885421000] [2021-05-22 01:55:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:53,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:53,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885421000] [2021-05-22 01:55:53,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885421000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:53,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:53,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42827315] [2021-05-22 01:55:53,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:53,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:53,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:53,305 INFO L87 Difference]: Start difference. First operand 1448 states and 5751 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:53,365 INFO L93 Difference]: Finished difference Result 2795 states and 10353 transitions. [2021-05-22 01:55:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:53,370 INFO L225 Difference]: With dead ends: 2795 [2021-05-22 01:55:53,370 INFO L226 Difference]: Without dead ends: 2606 [2021-05-22 01:55:53,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-05-22 01:55:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1472. [2021-05-22 01:55:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9612508497620667) internal successors, (5827), 1471 states have internal predecessors, (5827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5827 transitions. [2021-05-22 01:55:53,403 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5827 transitions. Word has length 25 [2021-05-22 01:55:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:53,403 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5827 transitions. [2021-05-22 01:55:53,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5827 transitions. [2021-05-22 01:55:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:53,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:53,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:53,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-05-22 01:55:53,405 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:53,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1123975267, now seen corresponding path program 214 times [2021-05-22 01:55:53,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:53,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892166412] [2021-05-22 01:55:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:53,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:53,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892166412] [2021-05-22 01:55:53,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892166412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:53,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:53,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:53,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085952373] [2021-05-22 01:55:53,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:53,489 INFO L87 Difference]: Start difference. First operand 1472 states and 5827 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:53,548 INFO L93 Difference]: Finished difference Result 2653 states and 9899 transitions. [2021-05-22 01:55:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:53,552 INFO L225 Difference]: With dead ends: 2653 [2021-05-22 01:55:53,553 INFO L226 Difference]: Without dead ends: 2454 [2021-05-22 01:55:53,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-05-22 01:55:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 1448. [2021-05-22 01:55:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9661368348306842) internal successors, (5739), 1447 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5739 transitions. [2021-05-22 01:55:53,584 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5739 transitions. Word has length 25 [2021-05-22 01:55:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:53,584 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5739 transitions. [2021-05-22 01:55:53,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5739 transitions. [2021-05-22 01:55:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:53,586 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:53,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:53,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-05-22 01:55:53,587 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash -697415941, now seen corresponding path program 215 times [2021-05-22 01:55:53,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:53,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292050391] [2021-05-22 01:55:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:53,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:53,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292050391] [2021-05-22 01:55:53,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292050391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:53,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:53,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:53,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795038810] [2021-05-22 01:55:53,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:53,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:53,660 INFO L87 Difference]: Start difference. First operand 1448 states and 5739 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:53,737 INFO L93 Difference]: Finished difference Result 2793 states and 10336 transitions. [2021-05-22 01:55:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:53,742 INFO L225 Difference]: With dead ends: 2793 [2021-05-22 01:55:53,742 INFO L226 Difference]: Without dead ends: 2606 [2021-05-22 01:55:53,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-05-22 01:55:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1472. [2021-05-22 01:55:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9530931339225015) internal successors, (5815), 1471 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5815 transitions. [2021-05-22 01:55:53,775 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5815 transitions. Word has length 25 [2021-05-22 01:55:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:53,775 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5815 transitions. [2021-05-22 01:55:53,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5815 transitions. [2021-05-22 01:55:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:53,777 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:53,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:53,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-05-22 01:55:53,777 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash -904223907, now seen corresponding path program 216 times [2021-05-22 01:55:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227142835] [2021-05-22 01:55:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:53,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:53,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227142835] [2021-05-22 01:55:53,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227142835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:53,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:53,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:53,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809587088] [2021-05-22 01:55:53,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:53,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:53,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:53,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:53,852 INFO L87 Difference]: Start difference. First operand 1472 states and 5815 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:53,916 INFO L93 Difference]: Finished difference Result 2653 states and 9887 transitions. [2021-05-22 01:55:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:53,921 INFO L225 Difference]: With dead ends: 2653 [2021-05-22 01:55:53,921 INFO L226 Difference]: Without dead ends: 2438 [2021-05-22 01:55:53,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-05-22 01:55:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1432. [2021-05-22 01:55:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.981132075471698) internal successors, (5697), 1431 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5697 transitions. [2021-05-22 01:55:53,953 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5697 transitions. Word has length 25 [2021-05-22 01:55:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:53,953 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5697 transitions. [2021-05-22 01:55:53,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5697 transitions. [2021-05-22 01:55:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:53,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:53,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:53,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-05-22 01:55:53,955 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1532080991, now seen corresponding path program 217 times [2021-05-22 01:55:53,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:53,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930419637] [2021-05-22 01:55:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:54,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:54,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930419637] [2021-05-22 01:55:54,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930419637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:54,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:54,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:54,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138521074] [2021-05-22 01:55:54,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:54,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:54,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:54,029 INFO L87 Difference]: Start difference. First operand 1432 states and 5697 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:54,089 INFO L93 Difference]: Finished difference Result 3154 states and 11754 transitions. [2021-05-22 01:55:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:54,095 INFO L225 Difference]: With dead ends: 3154 [2021-05-22 01:55:54,095 INFO L226 Difference]: Without dead ends: 2965 [2021-05-22 01:55:54,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-05-22 01:55:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 1492. [2021-05-22 01:55:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.9738430583501008) internal successors, (5925), 1491 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 5925 transitions. [2021-05-22 01:55:54,131 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 5925 transitions. Word has length 25 [2021-05-22 01:55:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:54,131 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 5925 transitions. [2021-05-22 01:55:54,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 5925 transitions. [2021-05-22 01:55:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:54,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:54,133 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:54,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-05-22 01:55:54,133 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash 719549311, now seen corresponding path program 218 times [2021-05-22 01:55:54,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:54,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064732283] [2021-05-22 01:55:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:54,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:54,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064732283] [2021-05-22 01:55:54,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064732283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:54,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:54,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:54,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929046715] [2021-05-22 01:55:54,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:54,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:54,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:54,207 INFO L87 Difference]: Start difference. First operand 1492 states and 5925 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:54,270 INFO L93 Difference]: Finished difference Result 3152 states and 11719 transitions. [2021-05-22 01:55:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:54,276 INFO L225 Difference]: With dead ends: 3152 [2021-05-22 01:55:54,276 INFO L226 Difference]: Without dead ends: 2935 [2021-05-22 01:55:54,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-05-22 01:55:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 1462. [2021-05-22 01:55:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.9835728952772076) internal successors, (5820), 1461 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5820 transitions. [2021-05-22 01:55:54,311 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5820 transitions. Word has length 25 [2021-05-22 01:55:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:54,311 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5820 transitions. [2021-05-22 01:55:54,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5820 transitions. [2021-05-22 01:55:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:54,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:54,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:54,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-05-22 01:55:54,313 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 646806655, now seen corresponding path program 219 times [2021-05-22 01:55:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:54,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036489480] [2021-05-22 01:55:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:54,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:54,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036489480] [2021-05-22 01:55:54,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036489480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:54,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:54,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:54,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775976316] [2021-05-22 01:55:54,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:54,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:54,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:54,396 INFO L87 Difference]: Start difference. First operand 1462 states and 5820 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:54,456 INFO L93 Difference]: Finished difference Result 3136 states and 11679 transitions. [2021-05-22 01:55:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:54,462 INFO L225 Difference]: With dead ends: 3136 [2021-05-22 01:55:54,462 INFO L226 Difference]: Without dead ends: 2947 [2021-05-22 01:55:54,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-05-22 01:55:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1486. [2021-05-22 01:55:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.9703703703703703) internal successors, (5896), 1485 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5896 transitions. [2021-05-22 01:55:54,498 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5896 transitions. Word has length 25 [2021-05-22 01:55:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:54,498 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5896 transitions. [2021-05-22 01:55:54,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5896 transitions. [2021-05-22 01:55:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:54,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:54,500 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:54,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-05-22 01:55:54,500 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1202594943, now seen corresponding path program 220 times [2021-05-22 01:55:54,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:54,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135524369] [2021-05-22 01:55:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:54,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:54,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135524369] [2021-05-22 01:55:54,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135524369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:54,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:54,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:54,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153437938] [2021-05-22 01:55:54,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:54,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:54,584 INFO L87 Difference]: Start difference. First operand 1486 states and 5896 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:54,643 INFO L93 Difference]: Finished difference Result 3122 states and 11610 transitions. [2021-05-22 01:55:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:54,649 INFO L225 Difference]: With dead ends: 3122 [2021-05-22 01:55:54,649 INFO L226 Difference]: Without dead ends: 2923 [2021-05-22 01:55:54,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-05-22 01:55:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1462. [2021-05-22 01:55:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.975359342915811) internal successors, (5808), 1461 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5808 transitions. [2021-05-22 01:55:54,684 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5808 transitions. Word has length 25 [2021-05-22 01:55:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:54,684 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5808 transitions. [2021-05-22 01:55:54,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5808 transitions. [2021-05-22 01:55:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:54,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:54,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:54,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-05-22 01:55:54,686 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1629154269, now seen corresponding path program 221 times [2021-05-22 01:55:54,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:54,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517272086] [2021-05-22 01:55:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:54,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517272086] [2021-05-22 01:55:54,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517272086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:54,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:54,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:54,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039628174] [2021-05-22 01:55:54,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:54,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:54,777 INFO L87 Difference]: Start difference. First operand 1462 states and 5808 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:54,841 INFO L93 Difference]: Finished difference Result 3132 states and 11657 transitions. [2021-05-22 01:55:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:54,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:54,846 INFO L225 Difference]: With dead ends: 3132 [2021-05-22 01:55:54,847 INFO L226 Difference]: Without dead ends: 2945 [2021-05-22 01:55:54,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-05-22 01:55:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1486. [2021-05-22 01:55:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.962289562289562) internal successors, (5884), 1485 states have internal predecessors, (5884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5884 transitions. [2021-05-22 01:55:54,882 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5884 transitions. Word has length 25 [2021-05-22 01:55:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:54,882 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 5884 transitions. [2021-05-22 01:55:54,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5884 transitions. [2021-05-22 01:55:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:54,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:54,884 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:54,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-05-22 01:55:54,884 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1422346303, now seen corresponding path program 222 times [2021-05-22 01:55:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111493016] [2021-05-22 01:55:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:54,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:54,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111493016] [2021-05-22 01:55:54,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111493016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:54,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:54,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:54,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968109857] [2021-05-22 01:55:54,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:54,958 INFO L87 Difference]: Start difference. First operand 1486 states and 5884 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:55,039 INFO L93 Difference]: Finished difference Result 3120 states and 11593 transitions. [2021-05-22 01:55:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:55,045 INFO L225 Difference]: With dead ends: 3120 [2021-05-22 01:55:55,045 INFO L226 Difference]: Without dead ends: 2909 [2021-05-22 01:55:55,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-05-22 01:55:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 1450. [2021-05-22 01:55:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.9820565907522427) internal successors, (5770), 1449 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 5770 transitions. [2021-05-22 01:55:55,080 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 5770 transitions. Word has length 25 [2021-05-22 01:55:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:55,080 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 5770 transitions. [2021-05-22 01:55:55,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 5770 transitions. [2021-05-22 01:55:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:55,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:55,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:55,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-05-22 01:55:55,082 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash 799531391, now seen corresponding path program 223 times [2021-05-22 01:55:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:55,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113869014] [2021-05-22 01:55:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:55,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:55,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113869014] [2021-05-22 01:55:55,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113869014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:55,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:55,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:55,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550984976] [2021-05-22 01:55:55,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:55,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:55,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:55,158 INFO L87 Difference]: Start difference. First operand 1450 states and 5770 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:55,224 INFO L93 Difference]: Finished difference Result 3250 states and 12076 transitions. [2021-05-22 01:55:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:55,230 INFO L225 Difference]: With dead ends: 3250 [2021-05-22 01:55:55,230 INFO L226 Difference]: Without dead ends: 3061 [2021-05-22 01:55:55,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2021-05-22 01:55:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 1519. [2021-05-22 01:55:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.963109354413702) internal successors, (6016), 1518 states have internal predecessors, (6016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6016 transitions. [2021-05-22 01:55:55,268 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6016 transitions. Word has length 25 [2021-05-22 01:55:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:55,268 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6016 transitions. [2021-05-22 01:55:55,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6016 transitions. [2021-05-22 01:55:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:55,270 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:55,270 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:55,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-05-22 01:55:55,270 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1243805603, now seen corresponding path program 224 times [2021-05-22 01:55:55,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:55,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317663860] [2021-05-22 01:55:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:55,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317663860] [2021-05-22 01:55:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317663860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:55,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:55,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291710690] [2021-05-22 01:55:55,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:55,346 INFO L87 Difference]: Start difference. First operand 1519 states and 6016 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:55,406 INFO L93 Difference]: Finished difference Result 3248 states and 12041 transitions. [2021-05-22 01:55:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:55,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:55,412 INFO L225 Difference]: With dead ends: 3248 [2021-05-22 01:55:55,412 INFO L226 Difference]: Without dead ends: 3031 [2021-05-22 01:55:55,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-05-22 01:55:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 1489. [2021-05-22 01:55:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 3.9704301075268815) internal successors, (5908), 1488 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 5908 transitions. [2021-05-22 01:55:55,449 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 5908 transitions. Word has length 25 [2021-05-22 01:55:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:55,449 INFO L482 AbstractCegarLoop]: Abstraction has 1489 states and 5908 transitions. [2021-05-22 01:55:55,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 5908 transitions. [2021-05-22 01:55:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:55,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:55,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:55,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-05-22 01:55:55,451 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:55,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1918329343, now seen corresponding path program 225 times [2021-05-22 01:55:55,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:55,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397129786] [2021-05-22 01:55:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397129786] [2021-05-22 01:55:55,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397129786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:55,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:55,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:55,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440010856] [2021-05-22 01:55:55,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:55,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:55,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:55,533 INFO L87 Difference]: Start difference. First operand 1489 states and 5908 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:55,599 INFO L93 Difference]: Finished difference Result 3318 states and 12295 transitions. [2021-05-22 01:55:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:55,605 INFO L225 Difference]: With dead ends: 3318 [2021-05-22 01:55:55,605 INFO L226 Difference]: Without dead ends: 3129 [2021-05-22 01:55:55,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-05-22 01:55:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 1552. [2021-05-22 01:55:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.9426176660219214) internal successors, (6115), 1551 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 6115 transitions. [2021-05-22 01:55:55,643 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 6115 transitions. Word has length 25 [2021-05-22 01:55:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:55,643 INFO L482 AbstractCegarLoop]: Abstraction has 1552 states and 6115 transitions. [2021-05-22 01:55:55,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 6115 transitions. [2021-05-22 01:55:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:55,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:55,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:55,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-05-22 01:55:55,646 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:55,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1362541055, now seen corresponding path program 226 times [2021-05-22 01:55:55,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:55,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501603871] [2021-05-22 01:55:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:55,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:55,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501603871] [2021-05-22 01:55:55,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501603871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:55,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:55,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:55,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092838816] [2021-05-22 01:55:55,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:55,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:55,723 INFO L87 Difference]: Start difference. First operand 1552 states and 6115 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:55,787 INFO L93 Difference]: Finished difference Result 3351 states and 12378 transitions. [2021-05-22 01:55:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:55,794 INFO L225 Difference]: With dead ends: 3351 [2021-05-22 01:55:55,794 INFO L226 Difference]: Without dead ends: 3066 [2021-05-22 01:55:55,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-05-22 01:55:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1489. [2021-05-22 01:55:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 3.9495967741935485) internal successors, (5877), 1488 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 5877 transitions. [2021-05-22 01:55:55,829 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 5877 transitions. Word has length 25 [2021-05-22 01:55:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:55,829 INFO L482 AbstractCegarLoop]: Abstraction has 1489 states and 5877 transitions. [2021-05-22 01:55:55,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 5877 transitions. [2021-05-22 01:55:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:55,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:55,831 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:55,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-05-22 01:55:55,831 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1394290339, now seen corresponding path program 227 times [2021-05-22 01:55:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:55,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274810297] [2021-05-22 01:55:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:55,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:55,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274810297] [2021-05-22 01:55:55,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274810297] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:55,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:55,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989338603] [2021-05-22 01:55:55,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:55,905 INFO L87 Difference]: Start difference. First operand 1489 states and 5877 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:55,966 INFO L93 Difference]: Finished difference Result 3297 states and 12203 transitions. [2021-05-22 01:55:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:55,972 INFO L225 Difference]: With dead ends: 3297 [2021-05-22 01:55:55,972 INFO L226 Difference]: Without dead ends: 3110 [2021-05-22 01:55:55,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-05-22 01:55:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1535. [2021-05-22 01:55:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.9335071707953064) internal successors, (6034), 1534 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6034 transitions. [2021-05-22 01:55:56,008 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6034 transitions. Word has length 25 [2021-05-22 01:55:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:56,008 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6034 transitions. [2021-05-22 01:55:56,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6034 transitions. [2021-05-22 01:55:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:56,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:56,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:56,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-05-22 01:55:56,011 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:56,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:56,011 INFO L82 PathProgramCache]: Analyzing trace with hash 543287359, now seen corresponding path program 228 times [2021-05-22 01:55:56,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:56,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802469607] [2021-05-22 01:55:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:56,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:56,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802469607] [2021-05-22 01:55:56,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802469607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:56,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:56,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:56,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932582191] [2021-05-22 01:55:56,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:56,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:56,086 INFO L87 Difference]: Start difference. First operand 1535 states and 6034 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:56,138 INFO L93 Difference]: Finished difference Result 3332 states and 12292 transitions. [2021-05-22 01:55:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:56,144 INFO L225 Difference]: With dead ends: 3332 [2021-05-22 01:55:56,144 INFO L226 Difference]: Without dead ends: 3025 [2021-05-22 01:55:56,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-05-22 01:55:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1450. [2021-05-22 01:55:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.9696342305037957) internal successors, (5752), 1449 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 5752 transitions. [2021-05-22 01:55:56,180 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 5752 transitions. Word has length 25 [2021-05-22 01:55:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:56,181 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 5752 transitions. [2021-05-22 01:55:56,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 5752 transitions. [2021-05-22 01:55:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:56,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:56,182 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:56,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-05-22 01:55:56,183 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1336450467, now seen corresponding path program 229 times [2021-05-22 01:55:56,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:56,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612203190] [2021-05-22 01:55:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:56,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:56,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612203190] [2021-05-22 01:55:56,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612203190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:56,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:56,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:56,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339101430] [2021-05-22 01:55:56,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:56,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:56,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:56,283 INFO L87 Difference]: Start difference. First operand 1450 states and 5752 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:56,355 INFO L93 Difference]: Finished difference Result 3197 states and 11876 transitions. [2021-05-22 01:55:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:56,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:56,361 INFO L225 Difference]: With dead ends: 3197 [2021-05-22 01:55:56,361 INFO L226 Difference]: Without dead ends: 3008 [2021-05-22 01:55:56,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-22 01:55:56,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 1502. [2021-05-22 01:55:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.9626915389740174) internal successors, (5948), 1501 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5948 transitions. [2021-05-22 01:55:56,397 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5948 transitions. Word has length 25 [2021-05-22 01:55:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:56,397 INFO L482 AbstractCegarLoop]: Abstraction has 1502 states and 5948 transitions. [2021-05-22 01:55:56,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5948 transitions. [2021-05-22 01:55:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:56,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:56,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:56,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-05-22 01:55:56,399 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:56,400 INFO L82 PathProgramCache]: Analyzing trace with hash -780662179, now seen corresponding path program 230 times [2021-05-22 01:55:56,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:56,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784211452] [2021-05-22 01:55:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:56,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:56,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784211452] [2021-05-22 01:55:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784211452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:56,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:56,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761559271] [2021-05-22 01:55:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:56,491 INFO L87 Difference]: Start difference. First operand 1502 states and 5948 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:56,553 INFO L93 Difference]: Finished difference Result 3183 states and 11807 transitions. [2021-05-22 01:55:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:56,561 INFO L225 Difference]: With dead ends: 3183 [2021-05-22 01:55:56,561 INFO L226 Difference]: Without dead ends: 2984 [2021-05-22 01:55:56,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2021-05-22 01:55:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 1478. [2021-05-22 01:55:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.967501692620176) internal successors, (5860), 1477 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 5860 transitions. [2021-05-22 01:55:56,597 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 5860 transitions. Word has length 25 [2021-05-22 01:55:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:56,597 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 5860 transitions. [2021-05-22 01:55:56,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 5860 transitions. [2021-05-22 01:55:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:56,599 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:56,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:56,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-05-22 01:55:56,599 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1953973825, now seen corresponding path program 231 times [2021-05-22 01:55:56,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:56,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940032682] [2021-05-22 01:55:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:56,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:56,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940032682] [2021-05-22 01:55:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940032682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:56,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:56,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:56,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034544876] [2021-05-22 01:55:56,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:56,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:56,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:56,683 INFO L87 Difference]: Start difference. First operand 1478 states and 5860 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:56,749 INFO L93 Difference]: Finished difference Result 3220 states and 11923 transitions. [2021-05-22 01:55:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:56,755 INFO L225 Difference]: With dead ends: 3220 [2021-05-22 01:55:56,755 INFO L226 Difference]: Without dead ends: 3031 [2021-05-22 01:55:56,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-05-22 01:55:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 1541. [2021-05-22 01:55:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.93961038961039) internal successors, (6067), 1540 states have internal predecessors, (6067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 6067 transitions. [2021-05-22 01:55:56,793 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 6067 transitions. Word has length 25 [2021-05-22 01:55:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:56,793 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 6067 transitions. [2021-05-22 01:55:56,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 6067 transitions. [2021-05-22 01:55:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:56,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:56,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:56,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-05-22 01:55:56,795 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash -670471587, now seen corresponding path program 232 times [2021-05-22 01:55:56,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:56,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648507912] [2021-05-22 01:55:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:56,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:56,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648507912] [2021-05-22 01:55:56,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648507912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:56,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:56,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074309629] [2021-05-22 01:55:56,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:56,879 INFO L87 Difference]: Start difference. First operand 1541 states and 6067 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:56,933 INFO L93 Difference]: Finished difference Result 3253 states and 12006 transitions. [2021-05-22 01:55:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:56,938 INFO L225 Difference]: With dead ends: 3253 [2021-05-22 01:55:56,939 INFO L226 Difference]: Without dead ends: 2968 [2021-05-22 01:55:56,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-05-22 01:55:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1478. [2021-05-22 01:55:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.948544346648612) internal successors, (5832), 1477 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 5832 transitions. [2021-05-22 01:55:56,974 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 5832 transitions. Word has length 25 [2021-05-22 01:55:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:56,974 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 5832 transitions. [2021-05-22 01:55:56,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 5832 transitions. [2021-05-22 01:55:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:56,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:56,976 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:56,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-05-22 01:55:56,976 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:56,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1977705053, now seen corresponding path program 233 times [2021-05-22 01:55:56,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:56,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233165792] [2021-05-22 01:55:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:57,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:57,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233165792] [2021-05-22 01:55:57,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233165792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:57,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:57,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46327100] [2021-05-22 01:55:57,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:57,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:57,065 INFO L87 Difference]: Start difference. First operand 1478 states and 5832 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:57,126 INFO L93 Difference]: Finished difference Result 3169 states and 11731 transitions. [2021-05-22 01:55:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:57,132 INFO L225 Difference]: With dead ends: 3169 [2021-05-22 01:55:57,132 INFO L226 Difference]: Without dead ends: 2994 [2021-05-22 01:55:57,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-05-22 01:55:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 1518. [2021-05-22 01:55:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.936717205009888) internal successors, (5972), 1517 states have internal predecessors, (5972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5972 transitions. [2021-05-22 01:55:57,169 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5972 transitions. Word has length 25 [2021-05-22 01:55:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:57,169 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5972 transitions. [2021-05-22 01:55:57,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5972 transitions. [2021-05-22 01:55:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:57,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:57,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:57,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-05-22 01:55:57,171 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2098910657, now seen corresponding path program 234 times [2021-05-22 01:55:57,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:57,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11909997] [2021-05-22 01:55:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:57,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:57,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11909997] [2021-05-22 01:55:57,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11909997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:57,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:57,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308031918] [2021-05-22 01:55:57,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:57,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:57,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:57,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:57,261 INFO L87 Difference]: Start difference. First operand 1518 states and 5972 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:57,317 INFO L93 Difference]: Finished difference Result 3121 states and 11531 transitions. [2021-05-22 01:55:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:57,323 INFO L225 Difference]: With dead ends: 3121 [2021-05-22 01:55:57,323 INFO L226 Difference]: Without dead ends: 2831 [2021-05-22 01:55:57,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-05-22 01:55:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1450. [2021-05-22 01:55:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.9599723947550034) internal successors, (5738), 1449 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 5738 transitions. [2021-05-22 01:55:57,358 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 5738 transitions. Word has length 25 [2021-05-22 01:55:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:57,358 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 5738 transitions. [2021-05-22 01:55:57,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 5738 transitions. [2021-05-22 01:55:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:57,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:57,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:57,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-05-22 01:55:57,360 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash -364053957, now seen corresponding path program 235 times [2021-05-22 01:55:57,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:57,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579941386] [2021-05-22 01:55:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:57,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:57,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579941386] [2021-05-22 01:55:57,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579941386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:57,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:57,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773758912] [2021-05-22 01:55:57,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:57,435 INFO L87 Difference]: Start difference. First operand 1450 states and 5738 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:57,499 INFO L93 Difference]: Finished difference Result 3166 states and 11768 transitions. [2021-05-22 01:55:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:57,505 INFO L225 Difference]: With dead ends: 3166 [2021-05-22 01:55:57,505 INFO L226 Difference]: Without dead ends: 2979 [2021-05-22 01:55:57,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2021-05-22 01:55:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 1494. [2021-05-22 01:55:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.955793703951775) internal successors, (5906), 1493 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5906 transitions. [2021-05-22 01:55:57,542 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5906 transitions. Word has length 25 [2021-05-22 01:55:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:57,542 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5906 transitions. [2021-05-22 01:55:57,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5906 transitions. [2021-05-22 01:55:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:57,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:57,544 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:57,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-05-22 01:55:57,544 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash -570861923, now seen corresponding path program 236 times [2021-05-22 01:55:57,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:57,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363695403] [2021-05-22 01:55:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:57,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363695403] [2021-05-22 01:55:57,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363695403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:57,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:57,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:57,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86739584] [2021-05-22 01:55:57,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:57,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:57,617 INFO L87 Difference]: Start difference. First operand 1494 states and 5906 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:57,678 INFO L93 Difference]: Finished difference Result 3154 states and 11704 transitions. [2021-05-22 01:55:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:57,684 INFO L225 Difference]: With dead ends: 3154 [2021-05-22 01:55:57,684 INFO L226 Difference]: Without dead ends: 2955 [2021-05-22 01:55:57,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-05-22 01:55:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 1470. [2021-05-22 01:55:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.960517358747447) internal successors, (5818), 1469 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5818 transitions. [2021-05-22 01:55:57,719 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5818 transitions. Word has length 25 [2021-05-22 01:55:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:57,719 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5818 transitions. [2021-05-22 01:55:57,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5818 transitions. [2021-05-22 01:55:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:57,721 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:57,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:57,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-05-22 01:55:57,721 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -981577315, now seen corresponding path program 237 times [2021-05-22 01:55:57,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:57,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178629231] [2021-05-22 01:55:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:57,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178629231] [2021-05-22 01:55:57,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178629231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:57,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:57,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:57,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988617301] [2021-05-22 01:55:57,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:57,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:57,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:57,797 INFO L87 Difference]: Start difference. First operand 1470 states and 5818 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:57,883 INFO L93 Difference]: Finished difference Result 3189 states and 11815 transitions. [2021-05-22 01:55:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:57,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:57,889 INFO L225 Difference]: With dead ends: 3189 [2021-05-22 01:55:57,889 INFO L226 Difference]: Without dead ends: 3002 [2021-05-22 01:55:57,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-05-22 01:55:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1516. [2021-05-22 01:55:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.943894389438944) internal successors, (5975), 1515 states have internal predecessors, (5975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5975 transitions. [2021-05-22 01:55:57,925 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5975 transitions. Word has length 25 [2021-05-22 01:55:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:57,925 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5975 transitions. [2021-05-22 01:55:57,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5975 transitions. [2021-05-22 01:55:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:57,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:57,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:57,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-05-22 01:55:57,927 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1499676387, now seen corresponding path program 238 times [2021-05-22 01:55:57,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:57,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895908710] [2021-05-22 01:55:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:58,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:58,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895908710] [2021-05-22 01:55:58,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895908710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:58,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:58,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:58,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917291141] [2021-05-22 01:55:58,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:58,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:58,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:58,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:58,001 INFO L87 Difference]: Start difference. First operand 1516 states and 5975 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:58,051 INFO L93 Difference]: Finished difference Result 3224 states and 11904 transitions. [2021-05-22 01:55:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:58,057 INFO L225 Difference]: With dead ends: 3224 [2021-05-22 01:55:58,057 INFO L226 Difference]: Without dead ends: 2956 [2021-05-22 01:55:58,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-05-22 01:55:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 1470. [2021-05-22 01:55:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.9469026548672566) internal successors, (5798), 1469 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5798 transitions. [2021-05-22 01:55:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5798 transitions. Word has length 25 [2021-05-22 01:55:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:58,092 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 5798 transitions. [2021-05-22 01:55:58,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5798 transitions. [2021-05-22 01:55:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:58,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:58,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:58,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-05-22 01:55:58,094 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1720466687, now seen corresponding path program 239 times [2021-05-22 01:55:58,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:58,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369840367] [2021-05-22 01:55:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:58,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:58,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369840367] [2021-05-22 01:55:58,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369840367] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:58,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:58,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:58,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945320245] [2021-05-22 01:55:58,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:58,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:58,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:58,179 INFO L87 Difference]: Start difference. First operand 1470 states and 5798 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:58,246 INFO L93 Difference]: Finished difference Result 3159 states and 11692 transitions. [2021-05-22 01:55:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:58,251 INFO L225 Difference]: With dead ends: 3159 [2021-05-22 01:55:58,251 INFO L226 Difference]: Without dead ends: 2984 [2021-05-22 01:55:58,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2021-05-22 01:55:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 1510. [2021-05-22 01:55:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.9350563286944995) internal successors, (5938), 1509 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5938 transitions. [2021-05-22 01:55:58,287 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5938 transitions. Word has length 25 [2021-05-22 01:55:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:58,288 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 5938 transitions. [2021-05-22 01:55:58,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5938 transitions. [2021-05-22 01:55:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:58,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:58,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:58,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-05-22 01:55:58,290 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:58,290 INFO L82 PathProgramCache]: Analyzing trace with hash -100568739, now seen corresponding path program 240 times [2021-05-22 01:55:58,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:58,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898130662] [2021-05-22 01:55:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:58,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898130662] [2021-05-22 01:55:58,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898130662] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:58,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:58,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:58,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794144092] [2021-05-22 01:55:58,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:58,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:58,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:58,377 INFO L87 Difference]: Start difference. First operand 1510 states and 5938 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:58,430 INFO L93 Difference]: Finished difference Result 3111 states and 11492 transitions. [2021-05-22 01:55:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:58,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:58,436 INFO L225 Difference]: With dead ends: 3111 [2021-05-22 01:55:58,436 INFO L226 Difference]: Without dead ends: 2803 [2021-05-22 01:55:58,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-05-22 01:55:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1424. [2021-05-22 01:55:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.9880534082923402) internal successors, (5675), 1423 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 5675 transitions. [2021-05-22 01:55:58,471 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 5675 transitions. Word has length 25 [2021-05-22 01:55:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:58,471 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 5675 transitions. [2021-05-22 01:55:58,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 5675 transitions. [2021-05-22 01:55:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:58,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:58,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:58,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-05-22 01:55:58,473 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -272332129, now seen corresponding path program 241 times [2021-05-22 01:55:58,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:58,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460406169] [2021-05-22 01:55:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:58,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460406169] [2021-05-22 01:55:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460406169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:58,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:58,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:58,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838327949] [2021-05-22 01:55:58,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:58,562 INFO L87 Difference]: Start difference. First operand 1424 states and 5675 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:58,618 INFO L93 Difference]: Finished difference Result 3076 states and 11383 transitions. [2021-05-22 01:55:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:58,624 INFO L225 Difference]: With dead ends: 3076 [2021-05-22 01:55:58,624 INFO L226 Difference]: Without dead ends: 2917 [2021-05-22 01:55:58,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-05-22 01:55:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1480. [2021-05-22 01:55:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.980392156862745) internal successors, (5887), 1479 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 5887 transitions. [2021-05-22 01:55:58,660 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 5887 transitions. Word has length 25 [2021-05-22 01:55:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:58,660 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 5887 transitions. [2021-05-22 01:55:58,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 5887 transitions. [2021-05-22 01:55:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:58,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:58,662 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:58,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-05-22 01:55:58,662 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1280630113, now seen corresponding path program 242 times [2021-05-22 01:55:58,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:58,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452694706] [2021-05-22 01:55:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:58,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452694706] [2021-05-22 01:55:58,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452694706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:58,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:58,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:58,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463396060] [2021-05-22 01:55:58,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:58,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:58,748 INFO L87 Difference]: Start difference. First operand 1480 states and 5887 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:58,805 INFO L93 Difference]: Finished difference Result 3139 states and 11590 transitions. [2021-05-22 01:55:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:58,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:58,810 INFO L225 Difference]: With dead ends: 3139 [2021-05-22 01:55:58,811 INFO L226 Difference]: Without dead ends: 2885 [2021-05-22 01:55:58,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-05-22 01:55:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 1448. [2021-05-22 01:55:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.979958534899793) internal successors, (5759), 1447 states have internal predecessors, (5759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5759 transitions. [2021-05-22 01:55:58,845 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5759 transitions. Word has length 25 [2021-05-22 01:55:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:58,845 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5759 transitions. [2021-05-22 01:55:58,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5759 transitions. [2021-05-22 01:55:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:58,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:58,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:58,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-05-22 01:55:58,847 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash -233717445, now seen corresponding path program 243 times [2021-05-22 01:55:58,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:58,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448421656] [2021-05-22 01:55:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:58,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448421656] [2021-05-22 01:55:58,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448421656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:58,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:58,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:58,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023233750] [2021-05-22 01:55:58,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:58,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:58,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:58,935 INFO L87 Difference]: Start difference. First operand 1448 states and 5759 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:58,993 INFO L93 Difference]: Finished difference Result 3027 states and 11189 transitions. [2021-05-22 01:55:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:58,999 INFO L225 Difference]: With dead ends: 3027 [2021-05-22 01:55:58,999 INFO L226 Difference]: Without dead ends: 2868 [2021-05-22 01:55:58,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-05-22 01:55:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1464. [2021-05-22 01:55:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.969241285030759) internal successors, (5807), 1463 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5807 transitions. [2021-05-22 01:55:59,034 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5807 transitions. Word has length 25 [2021-05-22 01:55:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:59,034 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 5807 transitions. [2021-05-22 01:55:59,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5807 transitions. [2021-05-22 01:55:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:59,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:59,036 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:59,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-05-22 01:55:59,036 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1823652195, now seen corresponding path program 244 times [2021-05-22 01:55:59,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:59,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981614365] [2021-05-22 01:55:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:59,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:59,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981614365] [2021-05-22 01:55:59,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981614365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:59,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:59,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:59,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567379376] [2021-05-22 01:55:59,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:59,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:59,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:59,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:59,125 INFO L87 Difference]: Start difference. First operand 1464 states and 5807 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:59,198 INFO L93 Difference]: Finished difference Result 3057 states and 11282 transitions. [2021-05-22 01:55:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:59,204 INFO L225 Difference]: With dead ends: 3057 [2021-05-22 01:55:59,204 INFO L226 Difference]: Without dead ends: 2852 [2021-05-22 01:55:59,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-05-22 01:55:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1448. [2021-05-22 01:55:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9744298548721493) internal successors, (5751), 1447 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5751 transitions. [2021-05-22 01:55:59,239 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5751 transitions. Word has length 25 [2021-05-22 01:55:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:59,239 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5751 transitions. [2021-05-22 01:55:59,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5751 transitions. [2021-05-22 01:55:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:59,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:59,241 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:59,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-05-22 01:55:59,241 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:59,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1833151615, now seen corresponding path program 245 times [2021-05-22 01:55:59,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:59,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172183885] [2021-05-22 01:55:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:59,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:59,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172183885] [2021-05-22 01:55:59,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172183885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:59,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:59,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578944402] [2021-05-22 01:55:59,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:59,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:59,321 INFO L87 Difference]: Start difference. First operand 1448 states and 5751 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:59,392 INFO L93 Difference]: Finished difference Result 3167 states and 11687 transitions. [2021-05-22 01:55:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:59,398 INFO L225 Difference]: With dead ends: 3167 [2021-05-22 01:55:59,398 INFO L226 Difference]: Without dead ends: 2978 [2021-05-22 01:55:59,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-05-22 01:55:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1511. [2021-05-22 01:55:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.9456953642384107) internal successors, (5958), 1510 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5958 transitions. [2021-05-22 01:55:59,434 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5958 transitions. Word has length 25 [2021-05-22 01:55:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:59,434 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5958 transitions. [2021-05-22 01:55:59,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5958 transitions. [2021-05-22 01:55:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:59,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:59,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:59,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-05-22 01:55:59,436 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2131204573, now seen corresponding path program 246 times [2021-05-22 01:55:59,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:59,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701934746] [2021-05-22 01:55:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:59,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:59,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701934746] [2021-05-22 01:55:59,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701934746] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:59,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:59,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:59,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744340611] [2021-05-22 01:55:59,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:59,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:59,517 INFO L87 Difference]: Start difference. First operand 1511 states and 5958 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:59,578 INFO L93 Difference]: Finished difference Result 3200 states and 11770 transitions. [2021-05-22 01:55:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:59,583 INFO L225 Difference]: With dead ends: 3200 [2021-05-22 01:55:59,584 INFO L226 Difference]: Without dead ends: 2891 [2021-05-22 01:55:59,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2021-05-22 01:55:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 1424. [2021-05-22 01:55:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.9796205200281096) internal successors, (5663), 1423 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 5663 transitions. [2021-05-22 01:55:59,618 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 5663 transitions. Word has length 25 [2021-05-22 01:55:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:59,618 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 5663 transitions. [2021-05-22 01:55:59,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 5663 transitions. [2021-05-22 01:55:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:59,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:59,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:59,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-05-22 01:55:59,620 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:59,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1026847549, now seen corresponding path program 247 times [2021-05-22 01:55:59,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:59,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012769212] [2021-05-22 01:55:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:59,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:59,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012769212] [2021-05-22 01:55:59,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012769212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:59,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:59,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:59,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483559305] [2021-05-22 01:55:59,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:59,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:59,707 INFO L87 Difference]: Start difference. First operand 1424 states and 5663 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:59,761 INFO L93 Difference]: Finished difference Result 3043 states and 11268 transitions. [2021-05-22 01:55:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:59,766 INFO L225 Difference]: With dead ends: 3043 [2021-05-22 01:55:59,766 INFO L226 Difference]: Without dead ends: 2884 [2021-05-22 01:55:59,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2021-05-22 01:55:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 1472. [2021-05-22 01:55:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.9748470428280083) internal successors, (5847), 1471 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 5847 transitions. [2021-05-22 01:55:59,801 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 5847 transitions. Word has length 25 [2021-05-22 01:55:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:55:59,801 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 5847 transitions. [2021-05-22 01:55:59,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 5847 transitions. [2021-05-22 01:55:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:55:59,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:55:59,803 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:55:59,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-05-22 01:55:59,803 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:55:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:55:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash 18549565, now seen corresponding path program 248 times [2021-05-22 01:55:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:55:59,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136670722] [2021-05-22 01:55:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:55:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:55:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:55:59,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:55:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136670722] [2021-05-22 01:55:59,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136670722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:55:59,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:55:59,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:55:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228764265] [2021-05-22 01:55:59,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:55:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:55:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:55:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:55:59,903 INFO L87 Difference]: Start difference. First operand 1472 states and 5847 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:55:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:55:59,962 INFO L93 Difference]: Finished difference Result 3106 states and 11475 transitions. [2021-05-22 01:55:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:55:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:55:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:55:59,968 INFO L225 Difference]: With dead ends: 3106 [2021-05-22 01:55:59,968 INFO L226 Difference]: Without dead ends: 2852 [2021-05-22 01:55:59,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:55:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-05-22 01:55:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1440. [2021-05-22 01:55:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.974287699791522) internal successors, (5719), 1439 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5719 transitions. [2021-05-22 01:56:00,002 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5719 transitions. Word has length 25 [2021-05-22 01:56:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:00,002 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5719 transitions. [2021-05-22 01:56:00,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5719 transitions. [2021-05-22 01:56:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:00,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:00,004 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:00,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-05-22 01:56:00,004 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1234329889, now seen corresponding path program 249 times [2021-05-22 01:56:00,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:00,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971551131] [2021-05-22 01:56:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:00,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:00,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971551131] [2021-05-22 01:56:00,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971551131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:00,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:00,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131372840] [2021-05-22 01:56:00,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:00,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:00,107 INFO L87 Difference]: Start difference. First operand 1440 states and 5719 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:00,167 INFO L93 Difference]: Finished difference Result 2988 states and 11057 transitions. [2021-05-22 01:56:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:00,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:00,172 INFO L225 Difference]: With dead ends: 2988 [2021-05-22 01:56:00,172 INFO L226 Difference]: Without dead ends: 2829 [2021-05-22 01:56:00,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-05-22 01:56:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 1456. [2021-05-22 01:56:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.963573883161512) internal successors, (5767), 1455 states have internal predecessors, (5767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5767 transitions. [2021-05-22 01:56:00,207 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5767 transitions. Word has length 25 [2021-05-22 01:56:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:00,207 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5767 transitions. [2021-05-22 01:56:00,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5767 transitions. [2021-05-22 01:56:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:00,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:00,209 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:00,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-05-22 01:56:00,209 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:00,210 INFO L82 PathProgramCache]: Analyzing trace with hash 446166751, now seen corresponding path program 250 times [2021-05-22 01:56:00,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:00,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114109669] [2021-05-22 01:56:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:00,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:00,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114109669] [2021-05-22 01:56:00,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114109669] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:00,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:00,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:00,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808601372] [2021-05-22 01:56:00,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:00,290 INFO L87 Difference]: Start difference. First operand 1456 states and 5767 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:00,362 INFO L93 Difference]: Finished difference Result 3012 states and 11133 transitions. [2021-05-22 01:56:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:00,367 INFO L225 Difference]: With dead ends: 3012 [2021-05-22 01:56:00,368 INFO L226 Difference]: Without dead ends: 2813 [2021-05-22 01:56:00,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-05-22 01:56:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1440. [2021-05-22 01:56:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.968728283530229) internal successors, (5711), 1439 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5711 transitions. [2021-05-22 01:56:00,402 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5711 transitions. Word has length 25 [2021-05-22 01:56:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:00,402 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5711 transitions. [2021-05-22 01:56:00,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5711 transitions. [2021-05-22 01:56:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:00,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:00,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:00,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-05-22 01:56:00,405 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2134413023, now seen corresponding path program 251 times [2021-05-22 01:56:00,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:00,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850943458] [2021-05-22 01:56:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:00,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:00,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850943458] [2021-05-22 01:56:00,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850943458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:00,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:00,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333442412] [2021-05-22 01:56:00,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:00,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:00,510 INFO L87 Difference]: Start difference. First operand 1440 states and 5711 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:00,585 INFO L93 Difference]: Finished difference Result 3103 states and 11480 transitions. [2021-05-22 01:56:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:00,592 INFO L225 Difference]: With dead ends: 3103 [2021-05-22 01:56:00,592 INFO L226 Difference]: Without dead ends: 2920 [2021-05-22 01:56:00,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-05-22 01:56:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1484. [2021-05-22 01:56:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.9534726904922453) internal successors, (5863), 1483 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5863 transitions. [2021-05-22 01:56:00,632 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5863 transitions. Word has length 25 [2021-05-22 01:56:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:00,632 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 5863 transitions. [2021-05-22 01:56:00,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5863 transitions. [2021-05-22 01:56:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:00,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:00,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:00,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-05-22 01:56:00,634 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:00,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1130081085, now seen corresponding path program 252 times [2021-05-22 01:56:00,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:00,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965890458] [2021-05-22 01:56:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:00,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:00,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965890458] [2021-05-22 01:56:00,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965890458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:00,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:00,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076797222] [2021-05-22 01:56:00,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:00,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:00,729 INFO L87 Difference]: Start difference. First operand 1484 states and 5863 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:00,789 INFO L93 Difference]: Finished difference Result 3142 states and 11583 transitions. [2021-05-22 01:56:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:00,795 INFO L225 Difference]: With dead ends: 3142 [2021-05-22 01:56:00,795 INFO L226 Difference]: Without dead ends: 2860 [2021-05-22 01:56:00,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-05-22 01:56:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1424. [2021-05-22 01:56:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.9739985945186227) internal successors, (5655), 1423 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 5655 transitions. [2021-05-22 01:56:00,830 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 5655 transitions. Word has length 25 [2021-05-22 01:56:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:00,831 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 5655 transitions. [2021-05-22 01:56:00,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 5655 transitions. [2021-05-22 01:56:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:00,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:00,833 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:00,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-05-22 01:56:00,833 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1721451033, now seen corresponding path program 253 times [2021-05-22 01:56:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837441984] [2021-05-22 01:56:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:00,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:00,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837441984] [2021-05-22 01:56:00,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837441984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:00,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:00,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:00,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956677771] [2021-05-22 01:56:00,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:00,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:00,916 INFO L87 Difference]: Start difference. First operand 1424 states and 5655 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:00,975 INFO L93 Difference]: Finished difference Result 2921 states and 10804 transitions. [2021-05-22 01:56:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:00,980 INFO L225 Difference]: With dead ends: 2921 [2021-05-22 01:56:00,980 INFO L226 Difference]: Without dead ends: 2762 [2021-05-22 01:56:00,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-05-22 01:56:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1448. [2021-05-22 01:56:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9661368348306842) internal successors, (5739), 1447 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5739 transitions. [2021-05-22 01:56:01,014 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5739 transitions. Word has length 25 [2021-05-22 01:56:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:01,014 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5739 transitions. [2021-05-22 01:56:01,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5739 transitions. [2021-05-22 01:56:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:01,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:01,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:01,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-05-22 01:56:01,016 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash 131516283, now seen corresponding path program 254 times [2021-05-22 01:56:01,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:01,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031624830] [2021-05-22 01:56:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:01,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031624830] [2021-05-22 01:56:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031624830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:01,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:01,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:01,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010726723] [2021-05-22 01:56:01,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:01,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:01,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:01,096 INFO L87 Difference]: Start difference. First operand 1448 states and 5739 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:01,161 INFO L93 Difference]: Finished difference Result 2951 states and 10897 transitions. [2021-05-22 01:56:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:01,166 INFO L225 Difference]: With dead ends: 2951 [2021-05-22 01:56:01,166 INFO L226 Difference]: Without dead ends: 2746 [2021-05-22 01:56:01,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-05-22 01:56:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1432. [2021-05-22 01:56:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.971348707197764) internal successors, (5683), 1431 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5683 transitions. [2021-05-22 01:56:01,200 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5683 transitions. Word has length 25 [2021-05-22 01:56:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:01,200 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5683 transitions. [2021-05-22 01:56:01,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5683 transitions. [2021-05-22 01:56:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:01,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:01,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:01,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-05-22 01:56:01,202 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1514643067, now seen corresponding path program 255 times [2021-05-22 01:56:01,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:01,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937307917] [2021-05-22 01:56:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:01,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:01,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937307917] [2021-05-22 01:56:01,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937307917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:01,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:01,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138967615] [2021-05-22 01:56:01,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:01,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:01,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:01,282 INFO L87 Difference]: Start difference. First operand 1432 states and 5683 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:01,333 INFO L93 Difference]: Finished difference Result 2915 states and 10779 transitions. [2021-05-22 01:56:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:01,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:01,339 INFO L225 Difference]: With dead ends: 2915 [2021-05-22 01:56:01,339 INFO L226 Difference]: Without dead ends: 2756 [2021-05-22 01:56:01,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-05-22 01:56:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1448. [2021-05-22 01:56:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9606081548030407) internal successors, (5731), 1447 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5731 transitions. [2021-05-22 01:56:01,373 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5731 transitions. Word has length 25 [2021-05-22 01:56:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:01,373 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5731 transitions. [2021-05-22 01:56:01,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5731 transitions. [2021-05-22 01:56:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:01,375 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:01,375 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:01,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-05-22 01:56:01,375 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1099827589, now seen corresponding path program 256 times [2021-05-22 01:56:01,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:01,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151949081] [2021-05-22 01:56:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:01,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:01,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151949081] [2021-05-22 01:56:01,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151949081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:01,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:01,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:01,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431509945] [2021-05-22 01:56:01,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:01,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:01,462 INFO L87 Difference]: Start difference. First operand 1448 states and 5731 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:01,533 INFO L93 Difference]: Finished difference Result 2939 states and 10855 transitions. [2021-05-22 01:56:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:01,538 INFO L225 Difference]: With dead ends: 2939 [2021-05-22 01:56:01,538 INFO L226 Difference]: Without dead ends: 2740 [2021-05-22 01:56:01,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-05-22 01:56:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1432. [2021-05-22 01:56:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.96575821104123) internal successors, (5675), 1431 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5675 transitions. [2021-05-22 01:56:01,572 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5675 transitions. Word has length 25 [2021-05-22 01:56:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:01,572 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5675 transitions. [2021-05-22 01:56:01,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5675 transitions. [2021-05-22 01:56:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:01,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:01,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:01,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-05-22 01:56:01,574 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1363162275, now seen corresponding path program 257 times [2021-05-22 01:56:01,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:01,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78213352] [2021-05-22 01:56:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:01,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:01,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78213352] [2021-05-22 01:56:01,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78213352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:01,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:01,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:01,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277745409] [2021-05-22 01:56:01,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:01,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:01,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:01,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:01,648 INFO L87 Difference]: Start difference. First operand 1432 states and 5675 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:01,707 INFO L93 Difference]: Finished difference Result 2987 states and 11041 transitions. [2021-05-22 01:56:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:01,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:01,712 INFO L225 Difference]: With dead ends: 2987 [2021-05-22 01:56:01,713 INFO L226 Difference]: Without dead ends: 2798 [2021-05-22 01:56:01,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-05-22 01:56:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1460. [2021-05-22 01:56:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.949965729952022) internal successors, (5763), 1459 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5763 transitions. [2021-05-22 01:56:01,747 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5763 transitions. Word has length 25 [2021-05-22 01:56:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:01,747 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5763 transitions. [2021-05-22 01:56:01,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5763 transitions. [2021-05-22 01:56:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:01,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:01,749 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:01,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-05-22 01:56:01,749 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1539660475, now seen corresponding path program 258 times [2021-05-22 01:56:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:01,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664356995] [2021-05-22 01:56:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:01,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664356995] [2021-05-22 01:56:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664356995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:01,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915176293] [2021-05-22 01:56:01,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:01,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:01,822 INFO L87 Difference]: Start difference. First operand 1460 states and 5763 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:01,886 INFO L93 Difference]: Finished difference Result 2981 states and 10996 transitions. [2021-05-22 01:56:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:01,892 INFO L225 Difference]: With dead ends: 2981 [2021-05-22 01:56:01,892 INFO L226 Difference]: Without dead ends: 2762 [2021-05-22 01:56:01,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-05-22 01:56:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1424. [2021-05-22 01:56:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.971187631763879) internal successors, (5651), 1423 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 5651 transitions. [2021-05-22 01:56:01,925 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 5651 transitions. Word has length 25 [2021-05-22 01:56:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:01,925 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 5651 transitions. [2021-05-22 01:56:01,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 5651 transitions. [2021-05-22 01:56:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:01,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:01,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:01,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-05-22 01:56:01,927 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:01,927 INFO L82 PathProgramCache]: Analyzing trace with hash -457948993, now seen corresponding path program 259 times [2021-05-22 01:56:01,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:01,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648487606] [2021-05-22 01:56:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:02,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:02,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648487606] [2021-05-22 01:56:02,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648487606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:02,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:02,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:02,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428600378] [2021-05-22 01:56:02,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:02,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:02,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:02,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:02,027 INFO L87 Difference]: Start difference. First operand 1424 states and 5651 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:02,092 INFO L93 Difference]: Finished difference Result 3147 states and 11659 transitions. [2021-05-22 01:56:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:02,097 INFO L225 Difference]: With dead ends: 3147 [2021-05-22 01:56:02,097 INFO L226 Difference]: Without dead ends: 2958 [2021-05-22 01:56:02,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-05-22 01:56:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 1482. [2021-05-22 01:56:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.962187711006077) internal successors, (5868), 1481 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 5868 transitions. [2021-05-22 01:56:02,133 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 5868 transitions. Word has length 25 [2021-05-22 01:56:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:02,133 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 5868 transitions. [2021-05-22 01:56:02,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 5868 transitions. [2021-05-22 01:56:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:02,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:02,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:02,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-05-22 01:56:02,135 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1850093539, now seen corresponding path program 260 times [2021-05-22 01:56:02,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:02,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669656816] [2021-05-22 01:56:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:02,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669656816] [2021-05-22 01:56:02,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669656816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:02,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:02,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769897265] [2021-05-22 01:56:02,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:02,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:02,208 INFO L87 Difference]: Start difference. First operand 1482 states and 5868 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:02,267 INFO L93 Difference]: Finished difference Result 3141 states and 11614 transitions. [2021-05-22 01:56:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:02,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:02,273 INFO L225 Difference]: With dead ends: 3141 [2021-05-22 01:56:02,273 INFO L226 Difference]: Without dead ends: 2930 [2021-05-22 01:56:02,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-05-22 01:56:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1454. [2021-05-22 01:56:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.9683413626978665) internal successors, (5766), 1453 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5766 transitions. [2021-05-22 01:56:02,308 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5766 transitions. Word has length 25 [2021-05-22 01:56:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:02,308 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 5766 transitions. [2021-05-22 01:56:02,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5766 transitions. [2021-05-22 01:56:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:02,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:02,310 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-05-22 01:56:02,310 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 746700189, now seen corresponding path program 261 times [2021-05-22 01:56:02,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:02,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354288256] [2021-05-22 01:56:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:02,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:02,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354288256] [2021-05-22 01:56:02,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354288256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:02,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:02,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:02,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602957933] [2021-05-22 01:56:02,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:02,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:02,411 INFO L87 Difference]: Start difference. First operand 1454 states and 5766 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:02,490 INFO L93 Difference]: Finished difference Result 3221 states and 11898 transitions. [2021-05-22 01:56:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:02,496 INFO L225 Difference]: With dead ends: 3221 [2021-05-22 01:56:02,496 INFO L226 Difference]: Without dead ends: 3032 [2021-05-22 01:56:02,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-05-22 01:56:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 1517. [2021-05-22 01:56:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.9399736147757256) internal successors, (5973), 1516 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5973 transitions. [2021-05-22 01:56:02,532 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5973 transitions. Word has length 25 [2021-05-22 01:56:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:02,533 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5973 transitions. [2021-05-22 01:56:02,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5973 transitions. [2021-05-22 01:56:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:02,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:02,535 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:02,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-05-22 01:56:02,535 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1478782493, now seen corresponding path program 262 times [2021-05-22 01:56:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:02,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992853525] [2021-05-22 01:56:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:02,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:02,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992853525] [2021-05-22 01:56:02,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992853525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:02,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:02,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:02,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683109897] [2021-05-22 01:56:02,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:02,624 INFO L87 Difference]: Start difference. First operand 1517 states and 5973 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:02,683 INFO L93 Difference]: Finished difference Result 3254 states and 11981 transitions. [2021-05-22 01:56:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:02,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:02,690 INFO L225 Difference]: With dead ends: 3254 [2021-05-22 01:56:02,690 INFO L226 Difference]: Without dead ends: 2969 [2021-05-22 01:56:02,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2021-05-22 01:56:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 1454. [2021-05-22 01:56:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.94769442532691) internal successors, (5736), 1453 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5736 transitions. [2021-05-22 01:56:02,740 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5736 transitions. Word has length 25 [2021-05-22 01:56:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:02,740 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 5736 transitions. [2021-05-22 01:56:02,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5736 transitions. [2021-05-22 01:56:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:02,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:02,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:02,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-05-22 01:56:02,743 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1110957563, now seen corresponding path program 263 times [2021-05-22 01:56:02,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:02,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339974560] [2021-05-22 01:56:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:02,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:02,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339974560] [2021-05-22 01:56:02,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339974560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:02,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:02,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:02,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310652327] [2021-05-22 01:56:02,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:02,837 INFO L87 Difference]: Start difference. First operand 1454 states and 5736 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:02,897 INFO L93 Difference]: Finished difference Result 3190 states and 11776 transitions. [2021-05-22 01:56:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:02,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:02,902 INFO L225 Difference]: With dead ends: 3190 [2021-05-22 01:56:02,902 INFO L226 Difference]: Without dead ends: 3007 [2021-05-22 01:56:02,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-05-22 01:56:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1498. [2021-05-22 01:56:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.933199732798931) internal successors, (5888), 1497 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5888 transitions. [2021-05-22 01:56:02,938 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5888 transitions. Word has length 25 [2021-05-22 01:56:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:02,938 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5888 transitions. [2021-05-22 01:56:02,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5888 transitions. [2021-05-22 01:56:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:02,940 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:02,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:02,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-05-22 01:56:02,940 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash 41438557, now seen corresponding path program 264 times [2021-05-22 01:56:02,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:02,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913425852] [2021-05-22 01:56:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:03,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913425852] [2021-05-22 01:56:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913425852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:03,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:03,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222766606] [2021-05-22 01:56:03,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:03,023 INFO L87 Difference]: Start difference. First operand 1498 states and 5888 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:03,073 INFO L93 Difference]: Finished difference Result 3229 states and 11879 transitions. [2021-05-22 01:56:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:03,079 INFO L225 Difference]: With dead ends: 3229 [2021-05-22 01:56:03,079 INFO L226 Difference]: Without dead ends: 2921 [2021-05-22 01:56:03,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-22 01:56:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1412. [2021-05-22 01:56:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.9780297661233166) internal successors, (5613), 1411 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5613 transitions. [2021-05-22 01:56:03,113 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5613 transitions. Word has length 25 [2021-05-22 01:56:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:03,114 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5613 transitions. [2021-05-22 01:56:03,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5613 transitions. [2021-05-22 01:56:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:03,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:03,115 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:03,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-05-22 01:56:03,116 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:03,116 INFO L82 PathProgramCache]: Analyzing trace with hash 751563645, now seen corresponding path program 265 times [2021-05-22 01:56:03,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:03,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484285805] [2021-05-22 01:56:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:03,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:03,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484285805] [2021-05-22 01:56:03,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484285805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:03,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:03,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:03,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619433492] [2021-05-22 01:56:03,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:03,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:03,208 INFO L87 Difference]: Start difference. First operand 1412 states and 5613 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:03,258 INFO L93 Difference]: Finished difference Result 3022 states and 11152 transitions. [2021-05-22 01:56:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:03,263 INFO L225 Difference]: With dead ends: 3022 [2021-05-22 01:56:03,263 INFO L226 Difference]: Without dead ends: 2863 [2021-05-22 01:56:03,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-05-22 01:56:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 1444. [2021-05-22 01:56:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9674289674289676) internal successors, (5725), 1443 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5725 transitions. [2021-05-22 01:56:03,299 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5725 transitions. Word has length 25 [2021-05-22 01:56:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:03,299 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5725 transitions. [2021-05-22 01:56:03,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5725 transitions. [2021-05-22 01:56:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:03,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:03,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:03,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-05-22 01:56:03,301 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -256734339, now seen corresponding path program 266 times [2021-05-22 01:56:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:03,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405169555] [2021-05-22 01:56:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:03,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:03,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405169555] [2021-05-22 01:56:03,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405169555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:03,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:03,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:03,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420533596] [2021-05-22 01:56:03,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:03,405 INFO L87 Difference]: Start difference. First operand 1444 states and 5725 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:03,464 INFO L93 Difference]: Finished difference Result 3085 states and 11359 transitions. [2021-05-22 01:56:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:03,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:03,469 INFO L225 Difference]: With dead ends: 3085 [2021-05-22 01:56:03,469 INFO L226 Difference]: Without dead ends: 2831 [2021-05-22 01:56:03,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-05-22 01:56:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1412. [2021-05-22 01:56:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.966690290574061) internal successors, (5597), 1411 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5597 transitions. [2021-05-22 01:56:03,504 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5597 transitions. Word has length 25 [2021-05-22 01:56:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:03,504 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5597 transitions. [2021-05-22 01:56:03,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5597 transitions. [2021-05-22 01:56:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:03,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:03,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:03,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-05-22 01:56:03,506 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:03,506 INFO L82 PathProgramCache]: Analyzing trace with hash 790178329, now seen corresponding path program 267 times [2021-05-22 01:56:03,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:03,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503647260] [2021-05-22 01:56:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:03,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:03,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503647260] [2021-05-22 01:56:03,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503647260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:03,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:03,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:03,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039215571] [2021-05-22 01:56:03,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:03,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:03,601 INFO L87 Difference]: Start difference. First operand 1412 states and 5597 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:03,650 INFO L93 Difference]: Finished difference Result 2973 states and 10958 transitions. [2021-05-22 01:56:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:03,656 INFO L225 Difference]: With dead ends: 2973 [2021-05-22 01:56:03,656 INFO L226 Difference]: Without dead ends: 2814 [2021-05-22 01:56:03,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-05-22 01:56:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1428. [2021-05-22 01:56:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 3.955851436580238) internal successors, (5645), 1427 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 5645 transitions. [2021-05-22 01:56:03,691 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 5645 transitions. Word has length 25 [2021-05-22 01:56:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:03,691 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 5645 transitions. [2021-05-22 01:56:03,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 5645 transitions. [2021-05-22 01:56:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:03,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:03,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:03,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-05-22 01:56:03,693 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash -799756421, now seen corresponding path program 268 times [2021-05-22 01:56:03,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:03,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055707770] [2021-05-22 01:56:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:03,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055707770] [2021-05-22 01:56:03,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055707770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:03,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:03,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:03,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486087009] [2021-05-22 01:56:03,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:03,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:03,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:03,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:03,803 INFO L87 Difference]: Start difference. First operand 1428 states and 5645 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:03,874 INFO L93 Difference]: Finished difference Result 3003 states and 11051 transitions. [2021-05-22 01:56:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:03,879 INFO L225 Difference]: With dead ends: 3003 [2021-05-22 01:56:03,879 INFO L226 Difference]: Without dead ends: 2798 [2021-05-22 01:56:03,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-05-22 01:56:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1412. [2021-05-22 01:56:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.961020552799433) internal successors, (5589), 1411 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5589 transitions. [2021-05-22 01:56:03,914 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5589 transitions. Word has length 25 [2021-05-22 01:56:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:03,914 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5589 transitions. [2021-05-22 01:56:03,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5589 transitions. [2021-05-22 01:56:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:03,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:03,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:03,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-05-22 01:56:03,916 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1437919907, now seen corresponding path program 269 times [2021-05-22 01:56:03,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:03,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902537564] [2021-05-22 01:56:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:04,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:04,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902537564] [2021-05-22 01:56:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902537564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:04,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:04,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356268313] [2021-05-22 01:56:04,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:04,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:04,029 INFO L87 Difference]: Start difference. First operand 1412 states and 5589 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:04,099 INFO L93 Difference]: Finished difference Result 3113 states and 11456 transitions. [2021-05-22 01:56:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:04,105 INFO L225 Difference]: With dead ends: 3113 [2021-05-22 01:56:04,105 INFO L226 Difference]: Without dead ends: 2924 [2021-05-22 01:56:04,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-05-22 01:56:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 1475. [2021-05-22 01:56:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.932157394843962) internal successors, (5796), 1474 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 5796 transitions. [2021-05-22 01:56:04,141 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 5796 transitions. Word has length 25 [2021-05-22 01:56:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:04,141 INFO L482 AbstractCegarLoop]: Abstraction has 1475 states and 5796 transitions. [2021-05-22 01:56:04,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 5796 transitions. [2021-05-22 01:56:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:04,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:04,143 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:04,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-05-22 01:56:04,143 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1139866949, now seen corresponding path program 270 times [2021-05-22 01:56:04,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:04,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167233193] [2021-05-22 01:56:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:04,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:04,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167233193] [2021-05-22 01:56:04,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167233193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:04,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:04,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:04,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424944628] [2021-05-22 01:56:04,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:04,242 INFO L87 Difference]: Start difference. First operand 1475 states and 5796 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:04,297 INFO L93 Difference]: Finished difference Result 3146 states and 11539 transitions. [2021-05-22 01:56:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:04,303 INFO L225 Difference]: With dead ends: 3146 [2021-05-22 01:56:04,303 INFO L226 Difference]: Without dead ends: 2837 [2021-05-22 01:56:04,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2021-05-22 01:56:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 1388. [2021-05-22 01:56:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.966113914924297) internal successors, (5501), 1387 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5501 transitions. [2021-05-22 01:56:04,337 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5501 transitions. Word has length 25 [2021-05-22 01:56:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:04,337 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5501 transitions. [2021-05-22 01:56:04,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5501 transitions. [2021-05-22 01:56:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:04,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:04,338 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:04,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-05-22 01:56:04,339 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:04,339 INFO L82 PathProgramCache]: Analyzing trace with hash 811236285, now seen corresponding path program 271 times [2021-05-22 01:56:04,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:04,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017891631] [2021-05-22 01:56:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:04,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:04,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017891631] [2021-05-22 01:56:04,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017891631] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:04,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:04,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:04,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189680855] [2021-05-22 01:56:04,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:04,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:04,454 INFO L87 Difference]: Start difference. First operand 1388 states and 5501 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:04,504 INFO L93 Difference]: Finished difference Result 2945 states and 10865 transitions. [2021-05-22 01:56:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:04,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:04,510 INFO L225 Difference]: With dead ends: 2945 [2021-05-22 01:56:04,510 INFO L226 Difference]: Without dead ends: 2786 [2021-05-22 01:56:04,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-05-22 01:56:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1436. [2021-05-22 01:56:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.961672473867596) internal successors, (5685), 1435 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5685 transitions. [2021-05-22 01:56:04,548 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5685 transitions. Word has length 25 [2021-05-22 01:56:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:04,548 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 5685 transitions. [2021-05-22 01:56:04,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5685 transitions. [2021-05-22 01:56:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:04,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:04,550 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:04,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-05-22 01:56:04,550 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash -197061699, now seen corresponding path program 272 times [2021-05-22 01:56:04,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:04,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53629249] [2021-05-22 01:56:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:04,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53629249] [2021-05-22 01:56:04,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53629249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:04,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:04,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:04,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874741491] [2021-05-22 01:56:04,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:04,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:04,643 INFO L87 Difference]: Start difference. First operand 1436 states and 5685 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:04,694 INFO L93 Difference]: Finished difference Result 3008 states and 11072 transitions. [2021-05-22 01:56:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:04,699 INFO L225 Difference]: With dead ends: 3008 [2021-05-22 01:56:04,700 INFO L226 Difference]: Without dead ends: 2754 [2021-05-22 01:56:04,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-05-22 01:56:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1404. [2021-05-22 01:56:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9607982893799) internal successors, (5557), 1403 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5557 transitions. [2021-05-22 01:56:04,732 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5557 transitions. Word has length 25 [2021-05-22 01:56:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:04,733 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5557 transitions. [2021-05-22 01:56:04,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5557 transitions. [2021-05-22 01:56:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:04,734 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:04,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:04,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-05-22 01:56:04,735 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash -405184801, now seen corresponding path program 273 times [2021-05-22 01:56:04,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:04,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644974159] [2021-05-22 01:56:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:04,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:04,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644974159] [2021-05-22 01:56:04,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644974159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:04,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:04,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:04,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546684918] [2021-05-22 01:56:04,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:04,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:04,823 INFO L87 Difference]: Start difference. First operand 1404 states and 5557 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:04,881 INFO L93 Difference]: Finished difference Result 2850 states and 10514 transitions. [2021-05-22 01:56:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:04,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:04,886 INFO L225 Difference]: With dead ends: 2850 [2021-05-22 01:56:04,886 INFO L226 Difference]: Without dead ends: 2691 [2021-05-22 01:56:04,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-05-22 01:56:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 1420. [2021-05-22 01:56:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.9499647639182522) internal successors, (5605), 1419 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 5605 transitions. [2021-05-22 01:56:04,919 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 5605 transitions. Word has length 25 [2021-05-22 01:56:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:04,919 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 5605 transitions. [2021-05-22 01:56:04,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 5605 transitions. [2021-05-22 01:56:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:04,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:04,921 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:04,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-05-22 01:56:04,921 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1947510495, now seen corresponding path program 274 times [2021-05-22 01:56:04,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:04,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328238552] [2021-05-22 01:56:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:05,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328238552] [2021-05-22 01:56:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328238552] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:05,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:05,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606798136] [2021-05-22 01:56:05,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:05,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:05,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:05,007 INFO L87 Difference]: Start difference. First operand 1420 states and 5605 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:05,070 INFO L93 Difference]: Finished difference Result 2738 states and 10177 transitions. [2021-05-22 01:56:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:05,075 INFO L225 Difference]: With dead ends: 2738 [2021-05-22 01:56:05,075 INFO L226 Difference]: Without dead ends: 2547 [2021-05-22 01:56:05,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-05-22 01:56:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1404. [2021-05-22 01:56:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9550962223806128) internal successors, (5549), 1403 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5549 transitions. [2021-05-22 01:56:05,107 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5549 transitions. Word has length 25 [2021-05-22 01:56:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:05,107 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5549 transitions. [2021-05-22 01:56:05,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5549 transitions. [2021-05-22 01:56:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:05,108 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:05,108 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:05,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-05-22 01:56:05,109 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash -659210529, now seen corresponding path program 275 times [2021-05-22 01:56:05,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:05,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817405143] [2021-05-22 01:56:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:05,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:05,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817405143] [2021-05-22 01:56:05,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817405143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:05,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:05,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:05,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207170470] [2021-05-22 01:56:05,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:05,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:05,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:05,203 INFO L87 Difference]: Start difference. First operand 1404 states and 5549 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:05,265 INFO L93 Difference]: Finished difference Result 2985 states and 11005 transitions. [2021-05-22 01:56:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:05,271 INFO L225 Difference]: With dead ends: 2985 [2021-05-22 01:56:05,271 INFO L226 Difference]: Without dead ends: 2810 [2021-05-22 01:56:05,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-05-22 01:56:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1444. [2021-05-22 01:56:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.9424809424809424) internal successors, (5689), 1443 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5689 transitions. [2021-05-22 01:56:05,305 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5689 transitions. Word has length 25 [2021-05-22 01:56:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:05,305 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5689 transitions. [2021-05-22 01:56:05,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5689 transitions. [2021-05-22 01:56:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:05,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:05,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:05,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-05-22 01:56:05,307 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1980232381, now seen corresponding path program 276 times [2021-05-22 01:56:05,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:05,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076968615] [2021-05-22 01:56:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:05,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076968615] [2021-05-22 01:56:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076968615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:05,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:05,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:05,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895437911] [2021-05-22 01:56:05,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:05,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:05,402 INFO L87 Difference]: Start difference. First operand 1444 states and 5689 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:05,453 INFO L93 Difference]: Finished difference Result 2937 states and 10805 transitions. [2021-05-22 01:56:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:05,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:05,458 INFO L225 Difference]: With dead ends: 2937 [2021-05-22 01:56:05,458 INFO L226 Difference]: Without dead ends: 2659 [2021-05-22 01:56:05,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-05-22 01:56:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1388. [2021-05-22 01:56:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.9603460706560925) internal successors, (5493), 1387 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5493 transitions. [2021-05-22 01:56:05,493 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5493 transitions. Word has length 25 [2021-05-22 01:56:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:05,493 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5493 transitions. [2021-05-22 01:56:05,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5493 transitions. [2021-05-22 01:56:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:05,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:05,495 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:05,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-05-22 01:56:05,495 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash -456500583, now seen corresponding path program 277 times [2021-05-22 01:56:05,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:05,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691031900] [2021-05-22 01:56:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:05,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691031900] [2021-05-22 01:56:05,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691031900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:05,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:05,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:05,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612505587] [2021-05-22 01:56:05,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:05,593 INFO L87 Difference]: Start difference. First operand 1388 states and 5493 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:05,643 INFO L93 Difference]: Finished difference Result 2839 states and 10465 transitions. [2021-05-22 01:56:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:05,649 INFO L225 Difference]: With dead ends: 2839 [2021-05-22 01:56:05,649 INFO L226 Difference]: Without dead ends: 2680 [2021-05-22 01:56:05,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-22 01:56:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1412. [2021-05-22 01:56:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.952515946137491) internal successors, (5577), 1411 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5577 transitions. [2021-05-22 01:56:05,682 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5577 transitions. Word has length 25 [2021-05-22 01:56:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:05,682 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5577 transitions. [2021-05-22 01:56:05,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5577 transitions. [2021-05-22 01:56:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:05,684 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:05,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:05,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-05-22 01:56:05,684 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2046435333, now seen corresponding path program 278 times [2021-05-22 01:56:05,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:05,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068383500] [2021-05-22 01:56:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:05,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:05,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068383500] [2021-05-22 01:56:05,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068383500] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:05,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:05,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:05,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734191646] [2021-05-22 01:56:05,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:05,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:05,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:05,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:05,781 INFO L87 Difference]: Start difference. First operand 1412 states and 5577 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:05,843 INFO L93 Difference]: Finished difference Result 2869 states and 10558 transitions. [2021-05-22 01:56:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:05,849 INFO L225 Difference]: With dead ends: 2869 [2021-05-22 01:56:05,849 INFO L226 Difference]: Without dead ends: 2664 [2021-05-22 01:56:05,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-05-22 01:56:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1396. [2021-05-22 01:56:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.957706093189964) internal successors, (5521), 1395 states have internal predecessors, (5521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 5521 transitions. [2021-05-22 01:56:05,881 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 5521 transitions. Word has length 25 [2021-05-22 01:56:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:05,881 INFO L482 AbstractCegarLoop]: Abstraction has 1396 states and 5521 transitions. [2021-05-22 01:56:05,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 5521 transitions. [2021-05-22 01:56:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:05,883 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:05,883 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:05,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2021-05-22 01:56:05,883 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:05,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1951179141, now seen corresponding path program 279 times [2021-05-22 01:56:05,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:05,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855545640] [2021-05-22 01:56:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:05,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:05,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855545640] [2021-05-22 01:56:05,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855545640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:05,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:05,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:05,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611514590] [2021-05-22 01:56:05,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:05,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:05,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:05,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:05,973 INFO L87 Difference]: Start difference. First operand 1396 states and 5521 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:06,023 INFO L93 Difference]: Finished difference Result 2793 states and 10300 transitions. [2021-05-22 01:56:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:06,028 INFO L225 Difference]: With dead ends: 2793 [2021-05-22 01:56:06,029 INFO L226 Difference]: Without dead ends: 2634 [2021-05-22 01:56:06,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-05-22 01:56:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 1412. [2021-05-22 01:56:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.9468462083628633) internal successors, (5569), 1411 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5569 transitions. [2021-05-22 01:56:06,061 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5569 transitions. Word has length 25 [2021-05-22 01:56:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:06,061 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5569 transitions. [2021-05-22 01:56:06,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5569 transitions. [2021-05-22 01:56:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:06,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:06,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:06,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-05-22 01:56:06,063 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash 401516155, now seen corresponding path program 280 times [2021-05-22 01:56:06,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:06,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199683016] [2021-05-22 01:56:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:06,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199683016] [2021-05-22 01:56:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199683016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:06,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:06,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:06,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148551407] [2021-05-22 01:56:06,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:06,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:06,154 INFO L87 Difference]: Start difference. First operand 1412 states and 5569 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:06,218 INFO L93 Difference]: Finished difference Result 2681 states and 9963 transitions. [2021-05-22 01:56:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:06,222 INFO L225 Difference]: With dead ends: 2681 [2021-05-22 01:56:06,223 INFO L226 Difference]: Without dead ends: 2490 [2021-05-22 01:56:06,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-22 01:56:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1396. [2021-05-22 01:56:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.9519713261648746) internal successors, (5513), 1395 states have internal predecessors, (5513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 5513 transitions. [2021-05-22 01:56:06,255 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 5513 transitions. Word has length 25 [2021-05-22 01:56:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:06,255 INFO L482 AbstractCegarLoop]: Abstraction has 1396 states and 5513 transitions. [2021-05-22 01:56:06,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 5513 transitions. [2021-05-22 01:56:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:06,257 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:06,257 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:06,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-05-22 01:56:06,257 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash -534017187, now seen corresponding path program 281 times [2021-05-22 01:56:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:06,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417547666] [2021-05-22 01:56:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:06,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417547666] [2021-05-22 01:56:06,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417547666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:06,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:06,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907766997] [2021-05-22 01:56:06,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:06,386 INFO L87 Difference]: Start difference. First operand 1396 states and 5513 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:06,446 INFO L93 Difference]: Finished difference Result 2831 states and 10437 transitions. [2021-05-22 01:56:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:06,451 INFO L225 Difference]: With dead ends: 2831 [2021-05-22 01:56:06,451 INFO L226 Difference]: Without dead ends: 2642 [2021-05-22 01:56:06,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-05-22 01:56:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1420. [2021-05-22 01:56:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.938689217758985) internal successors, (5589), 1419 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 5589 transitions. [2021-05-22 01:56:06,484 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 5589 transitions. Word has length 25 [2021-05-22 01:56:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:06,484 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 5589 transitions. [2021-05-22 01:56:06,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 5589 transitions. [2021-05-22 01:56:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:06,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:06,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:06,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-05-22 01:56:06,486 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:06,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1274969285, now seen corresponding path program 282 times [2021-05-22 01:56:06,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:06,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344022925] [2021-05-22 01:56:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:06,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344022925] [2021-05-22 01:56:06,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344022925] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:06,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:06,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:06,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504073107] [2021-05-22 01:56:06,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:06,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:06,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:06,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:06,588 INFO L87 Difference]: Start difference. First operand 1420 states and 5589 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:06,651 INFO L93 Difference]: Finished difference Result 2689 states and 9983 transitions. [2021-05-22 01:56:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:06,656 INFO L225 Difference]: With dead ends: 2689 [2021-05-22 01:56:06,656 INFO L226 Difference]: Without dead ends: 2482 [2021-05-22 01:56:06,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-05-22 01:56:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1388. [2021-05-22 01:56:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.95746214852199) internal successors, (5489), 1387 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5489 transitions. [2021-05-22 01:56:06,690 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5489 transitions. Word has length 25 [2021-05-22 01:56:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:06,690 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5489 transitions. [2021-05-22 01:56:06,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5489 transitions. [2021-05-22 01:56:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:06,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:06,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:06,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-05-22 01:56:06,692 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash 371196095, now seen corresponding path program 283 times [2021-05-22 01:56:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:06,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529473058] [2021-05-22 01:56:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:06,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529473058] [2021-05-22 01:56:06,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529473058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:06,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:06,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280460139] [2021-05-22 01:56:06,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:06,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:06,791 INFO L87 Difference]: Start difference. First operand 1388 states and 5489 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:06,852 INFO L93 Difference]: Finished difference Result 3063 states and 11315 transitions. [2021-05-22 01:56:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:06,857 INFO L225 Difference]: With dead ends: 3063 [2021-05-22 01:56:06,857 INFO L226 Difference]: Without dead ends: 2874 [2021-05-22 01:56:06,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-05-22 01:56:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1440. [2021-05-22 01:56:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.9506601806810284) internal successors, (5685), 1439 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5685 transitions. [2021-05-22 01:56:06,895 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5685 transitions. Word has length 25 [2021-05-22 01:56:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:06,895 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5685 transitions. [2021-05-22 01:56:06,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5685 transitions. [2021-05-22 01:56:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:06,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:06,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:06,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-05-22 01:56:06,897 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:06,898 INFO L82 PathProgramCache]: Analyzing trace with hash -369756003, now seen corresponding path program 284 times [2021-05-22 01:56:06,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:06,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216647597] [2021-05-22 01:56:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:06,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:06,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216647597] [2021-05-22 01:56:06,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216647597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:06,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:06,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:06,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21873418] [2021-05-22 01:56:06,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:06,999 INFO L87 Difference]: Start difference. First operand 1440 states and 5685 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:07,061 INFO L93 Difference]: Finished difference Result 3049 states and 11246 transitions. [2021-05-22 01:56:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:07,066 INFO L225 Difference]: With dead ends: 3049 [2021-05-22 01:56:07,066 INFO L226 Difference]: Without dead ends: 2850 [2021-05-22 01:56:07,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-05-22 01:56:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 1416. [2021-05-22 01:56:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.95547703180212) internal successors, (5597), 1415 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5597 transitions. [2021-05-22 01:56:07,100 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5597 transitions. Word has length 25 [2021-05-22 01:56:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:07,100 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5597 transitions. [2021-05-22 01:56:07,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5597 transitions. [2021-05-22 01:56:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:07,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:07,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:07,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2021-05-22 01:56:07,102 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1449839331, now seen corresponding path program 285 times [2021-05-22 01:56:07,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:07,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015512220] [2021-05-22 01:56:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:07,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015512220] [2021-05-22 01:56:07,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015512220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:07,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:07,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:07,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497139564] [2021-05-22 01:56:07,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:07,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:07,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:07,192 INFO L87 Difference]: Start difference. First operand 1416 states and 5597 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:07,252 INFO L93 Difference]: Finished difference Result 3086 states and 11362 transitions. [2021-05-22 01:56:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:07,257 INFO L225 Difference]: With dead ends: 3086 [2021-05-22 01:56:07,258 INFO L226 Difference]: Without dead ends: 2897 [2021-05-22 01:56:07,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-05-22 01:56:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1479. [2021-05-22 01:56:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1478 states have (on average 3.9269282814614344) internal successors, (5804), 1478 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 5804 transitions. [2021-05-22 01:56:07,293 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 5804 transitions. Word has length 25 [2021-05-22 01:56:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:07,293 INFO L482 AbstractCegarLoop]: Abstraction has 1479 states and 5804 transitions. [2021-05-22 01:56:07,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 5804 transitions. [2021-05-22 01:56:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:07,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:07,295 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:07,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-05-22 01:56:07,295 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash 570113565, now seen corresponding path program 286 times [2021-05-22 01:56:07,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:07,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404292715] [2021-05-22 01:56:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:07,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:07,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404292715] [2021-05-22 01:56:07,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404292715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:07,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:07,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:07,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756641953] [2021-05-22 01:56:07,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:07,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:07,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:07,385 INFO L87 Difference]: Start difference. First operand 1479 states and 5804 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:07,438 INFO L93 Difference]: Finished difference Result 3119 states and 11445 transitions. [2021-05-22 01:56:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:07,443 INFO L225 Difference]: With dead ends: 3119 [2021-05-22 01:56:07,443 INFO L226 Difference]: Without dead ends: 2834 [2021-05-22 01:56:07,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-05-22 01:56:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1416. [2021-05-22 01:56:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.9356890459363956) internal successors, (5569), 1415 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5569 transitions. [2021-05-22 01:56:07,477 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5569 transitions. Word has length 25 [2021-05-22 01:56:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:07,477 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5569 transitions. [2021-05-22 01:56:07,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5569 transitions. [2021-05-22 01:56:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:07,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:07,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:07,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-05-22 01:56:07,479 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1703672197, now seen corresponding path program 287 times [2021-05-22 01:56:07,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:07,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213615177] [2021-05-22 01:56:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:07,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213615177] [2021-05-22 01:56:07,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213615177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:07,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:07,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:07,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646409013] [2021-05-22 01:56:07,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:07,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:07,577 INFO L87 Difference]: Start difference. First operand 1416 states and 5569 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:07,642 INFO L93 Difference]: Finished difference Result 3035 states and 11170 transitions. [2021-05-22 01:56:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:07,648 INFO L225 Difference]: With dead ends: 3035 [2021-05-22 01:56:07,648 INFO L226 Difference]: Without dead ends: 2860 [2021-05-22 01:56:07,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-05-22 01:56:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1456. [2021-05-22 01:56:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.9237113402061854) internal successors, (5709), 1455 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5709 transitions. [2021-05-22 01:56:07,682 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5709 transitions. Word has length 25 [2021-05-22 01:56:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:07,682 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5709 transitions. [2021-05-22 01:56:07,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5709 transitions. [2021-05-22 01:56:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:07,684 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:07,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:07,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2021-05-22 01:56:07,684 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1485320611, now seen corresponding path program 288 times [2021-05-22 01:56:07,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:07,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393905260] [2021-05-22 01:56:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:07,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:07,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393905260] [2021-05-22 01:56:07,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393905260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:07,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:07,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:07,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525365230] [2021-05-22 01:56:07,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:07,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:07,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:07,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:07,782 INFO L87 Difference]: Start difference. First operand 1456 states and 5709 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:07,841 INFO L93 Difference]: Finished difference Result 2987 states and 10970 transitions. [2021-05-22 01:56:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:07,846 INFO L225 Difference]: With dead ends: 2987 [2021-05-22 01:56:07,847 INFO L226 Difference]: Without dead ends: 2685 [2021-05-22 01:56:07,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-05-22 01:56:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1376. [2021-05-22 01:56:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.9643636363636365) internal successors, (5451), 1375 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 5451 transitions. [2021-05-22 01:56:07,880 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 5451 transitions. Word has length 25 [2021-05-22 01:56:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:07,880 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 5451 transitions. [2021-05-22 01:56:07,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 5451 transitions. [2021-05-22 01:56:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:07,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:07,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:07,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2021-05-22 01:56:07,882 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -194140965, now seen corresponding path program 289 times [2021-05-22 01:56:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:07,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394671648] [2021-05-22 01:56:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:07,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:07,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394671648] [2021-05-22 01:56:07,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394671648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:07,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:07,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28444326] [2021-05-22 01:56:07,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:07,977 INFO L87 Difference]: Start difference. First operand 1376 states and 5451 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:08,030 INFO L93 Difference]: Finished difference Result 2920 states and 10796 transitions. [2021-05-22 01:56:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:08,037 INFO L225 Difference]: With dead ends: 2920 [2021-05-22 01:56:08,037 INFO L226 Difference]: Without dead ends: 2761 [2021-05-22 01:56:08,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-05-22 01:56:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 1432. [2021-05-22 01:56:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.96575821104123) internal successors, (5675), 1431 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5675 transitions. [2021-05-22 01:56:08,073 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5675 transitions. Word has length 25 [2021-05-22 01:56:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:08,073 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5675 transitions. [2021-05-22 01:56:08,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5675 transitions. [2021-05-22 01:56:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:08,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:08,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:08,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-05-22 01:56:08,075 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:08,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1202438949, now seen corresponding path program 290 times [2021-05-22 01:56:08,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:08,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32608438] [2021-05-22 01:56:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32608438] [2021-05-22 01:56:08,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32608438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:08,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:08,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:08,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482104758] [2021-05-22 01:56:08,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:08,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:08,171 INFO L87 Difference]: Start difference. First operand 1432 states and 5675 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:08,225 INFO L93 Difference]: Finished difference Result 2983 states and 11003 transitions. [2021-05-22 01:56:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:08,231 INFO L225 Difference]: With dead ends: 2983 [2021-05-22 01:56:08,231 INFO L226 Difference]: Without dead ends: 2729 [2021-05-22 01:56:08,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-05-22 01:56:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1400. [2021-05-22 01:56:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.964974982130093) internal successors, (5547), 1399 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 5547 transitions. [2021-05-22 01:56:08,264 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 5547 transitions. Word has length 25 [2021-05-22 01:56:08,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:08,264 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 5547 transitions. [2021-05-22 01:56:08,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 5547 transitions. [2021-05-22 01:56:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:08,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:08,266 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:08,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2021-05-22 01:56:08,266 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1839648893, now seen corresponding path program 291 times [2021-05-22 01:56:08,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:08,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276249045] [2021-05-22 01:56:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:08,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276249045] [2021-05-22 01:56:08,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276249045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:08,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:08,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:08,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885864146] [2021-05-22 01:56:08,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:08,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:08,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:08,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:08,359 INFO L87 Difference]: Start difference. First operand 1400 states and 5547 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:08,410 INFO L93 Difference]: Finished difference Result 2865 states and 10585 transitions. [2021-05-22 01:56:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:08,415 INFO L225 Difference]: With dead ends: 2865 [2021-05-22 01:56:08,416 INFO L226 Difference]: Without dead ends: 2706 [2021-05-22 01:56:08,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-05-22 01:56:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1416. [2021-05-22 01:56:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.954063604240283) internal successors, (5595), 1415 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5595 transitions. [2021-05-22 01:56:08,448 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5595 transitions. Word has length 25 [2021-05-22 01:56:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:08,449 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5595 transitions. [2021-05-22 01:56:08,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5595 transitions. [2021-05-22 01:56:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:08,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:08,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:08,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-05-22 01:56:08,450 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash -774821763, now seen corresponding path program 292 times [2021-05-22 01:56:08,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:08,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018032494] [2021-05-22 01:56:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:08,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:08,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018032494] [2021-05-22 01:56:08,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018032494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:08,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:08,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:08,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120322025] [2021-05-22 01:56:08,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:08,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:08,550 INFO L87 Difference]: Start difference. First operand 1416 states and 5595 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:08,617 INFO L93 Difference]: Finished difference Result 2889 states and 10661 transitions. [2021-05-22 01:56:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:08,622 INFO L225 Difference]: With dead ends: 2889 [2021-05-22 01:56:08,622 INFO L226 Difference]: Without dead ends: 2690 [2021-05-22 01:56:08,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-05-22 01:56:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 1400. [2021-05-22 01:56:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.9592566118656185) internal successors, (5539), 1399 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 5539 transitions. [2021-05-22 01:56:08,655 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 5539 transitions. Word has length 25 [2021-05-22 01:56:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:08,655 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 5539 transitions. [2021-05-22 01:56:08,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 5539 transitions. [2021-05-22 01:56:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:08,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:08,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:08,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-05-22 01:56:08,657 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash 913424509, now seen corresponding path program 293 times [2021-05-22 01:56:08,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:08,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062797629] [2021-05-22 01:56:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:08,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:08,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062797629] [2021-05-22 01:56:08,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062797629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:08,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:08,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:08,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475286219] [2021-05-22 01:56:08,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:08,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:08,750 INFO L87 Difference]: Start difference. First operand 1400 states and 5539 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:08,816 INFO L93 Difference]: Finished difference Result 2980 states and 11008 transitions. [2021-05-22 01:56:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:08,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:08,822 INFO L225 Difference]: With dead ends: 2980 [2021-05-22 01:56:08,822 INFO L226 Difference]: Without dead ends: 2797 [2021-05-22 01:56:08,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-05-22 01:56:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1444. [2021-05-22 01:56:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.943866943866944) internal successors, (5691), 1443 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5691 transitions. [2021-05-22 01:56:08,857 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5691 transitions. Word has length 25 [2021-05-22 01:56:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:08,857 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5691 transitions. [2021-05-22 01:56:08,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5691 transitions. [2021-05-22 01:56:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:08,859 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:08,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:08,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-05-22 01:56:08,859 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:08,859 INFO L82 PathProgramCache]: Analyzing trace with hash -90907429, now seen corresponding path program 294 times [2021-05-22 01:56:08,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:08,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322835903] [2021-05-22 01:56:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:08,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:08,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322835903] [2021-05-22 01:56:08,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322835903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:08,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:08,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:08,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079877712] [2021-05-22 01:56:08,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:08,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:08,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:08,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:08,953 INFO L87 Difference]: Start difference. First operand 1444 states and 5691 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:09,015 INFO L93 Difference]: Finished difference Result 3019 states and 11111 transitions. [2021-05-22 01:56:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:09,020 INFO L225 Difference]: With dead ends: 3019 [2021-05-22 01:56:09,020 INFO L226 Difference]: Without dead ends: 2737 [2021-05-22 01:56:09,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-05-22 01:56:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1384. [2021-05-22 01:56:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.9645697758496024) internal successors, (5483), 1383 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 5483 transitions. [2021-05-22 01:56:09,052 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 5483 transitions. Word has length 25 [2021-05-22 01:56:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:09,052 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 5483 transitions. [2021-05-22 01:56:09,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 5483 transitions. [2021-05-22 01:56:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:09,054 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:09,054 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:09,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-05-22 01:56:09,054 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:09,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1515460797, now seen corresponding path program 295 times [2021-05-22 01:56:09,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:09,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512362001] [2021-05-22 01:56:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:09,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:09,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512362001] [2021-05-22 01:56:09,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512362001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:09,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:09,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:09,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129688967] [2021-05-22 01:56:09,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:09,147 INFO L87 Difference]: Start difference. First operand 1384 states and 5483 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:09,205 INFO L93 Difference]: Finished difference Result 2860 states and 10544 transitions. [2021-05-22 01:56:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:09,210 INFO L225 Difference]: With dead ends: 2860 [2021-05-22 01:56:09,210 INFO L226 Difference]: Without dead ends: 2701 [2021-05-22 01:56:09,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-05-22 01:56:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1432. [2021-05-22 01:56:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.960167714884696) internal successors, (5667), 1431 states have internal predecessors, (5667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5667 transitions. [2021-05-22 01:56:09,243 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5667 transitions. Word has length 25 [2021-05-22 01:56:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:09,243 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5667 transitions. [2021-05-22 01:56:09,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5667 transitions. [2021-05-22 01:56:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:09,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:09,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:09,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-05-22 01:56:09,245 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash 507162813, now seen corresponding path program 296 times [2021-05-22 01:56:09,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:09,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823151401] [2021-05-22 01:56:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:09,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:09,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823151401] [2021-05-22 01:56:09,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823151401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:09,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:09,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:09,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379163391] [2021-05-22 01:56:09,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:09,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:09,337 INFO L87 Difference]: Start difference. First operand 1432 states and 5667 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:09,390 INFO L93 Difference]: Finished difference Result 2923 states and 10751 transitions. [2021-05-22 01:56:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:09,395 INFO L225 Difference]: With dead ends: 2923 [2021-05-22 01:56:09,395 INFO L226 Difference]: Without dead ends: 2669 [2021-05-22 01:56:09,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-05-22 01:56:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1400. [2021-05-22 01:56:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.9592566118656185) internal successors, (5539), 1399 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 5539 transitions. [2021-05-22 01:56:09,427 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 5539 transitions. Word has length 25 [2021-05-22 01:56:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:09,427 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 5539 transitions. [2021-05-22 01:56:09,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 5539 transitions. [2021-05-22 01:56:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:09,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:09,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:09,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-05-22 01:56:09,429 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1728997379, now seen corresponding path program 297 times [2021-05-22 01:56:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:09,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364322725] [2021-05-22 01:56:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:09,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364322725] [2021-05-22 01:56:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364322725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:09,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:09,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:09,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679062866] [2021-05-22 01:56:09,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:09,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:09,523 INFO L87 Difference]: Start difference. First operand 1400 states and 5539 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:09,574 INFO L93 Difference]: Finished difference Result 2765 states and 10193 transitions. [2021-05-22 01:56:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:09,579 INFO L225 Difference]: With dead ends: 2765 [2021-05-22 01:56:09,579 INFO L226 Difference]: Without dead ends: 2606 [2021-05-22 01:56:09,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-05-22 01:56:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1416. [2021-05-22 01:56:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.948409893992933) internal successors, (5587), 1415 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5587 transitions. [2021-05-22 01:56:09,612 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5587 transitions. Word has length 25 [2021-05-22 01:56:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:09,612 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5587 transitions. [2021-05-22 01:56:09,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5587 transitions. [2021-05-22 01:56:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:09,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:09,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:09,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2021-05-22 01:56:09,614 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 623697917, now seen corresponding path program 298 times [2021-05-22 01:56:09,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:09,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936705667] [2021-05-22 01:56:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:09,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:09,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936705667] [2021-05-22 01:56:09,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936705667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:09,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:09,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:09,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570858362] [2021-05-22 01:56:09,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:09,716 INFO L87 Difference]: Start difference. First operand 1416 states and 5587 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:09,785 INFO L93 Difference]: Finished difference Result 2653 states and 9856 transitions. [2021-05-22 01:56:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:09,790 INFO L225 Difference]: With dead ends: 2653 [2021-05-22 01:56:09,790 INFO L226 Difference]: Without dead ends: 2462 [2021-05-22 01:56:09,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-05-22 01:56:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1400. [2021-05-22 01:56:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.9535382416011435) internal successors, (5531), 1399 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 5531 transitions. [2021-05-22 01:56:09,821 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 5531 transitions. Word has length 25 [2021-05-22 01:56:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:09,821 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 5531 transitions. [2021-05-22 01:56:09,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 5531 transitions. [2021-05-22 01:56:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:09,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:09,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:09,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2021-05-22 01:56:09,823 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1983023107, now seen corresponding path program 299 times [2021-05-22 01:56:09,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:09,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106285160] [2021-05-22 01:56:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:09,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:09,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106285160] [2021-05-22 01:56:09,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106285160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:09,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:09,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779797747] [2021-05-22 01:56:09,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:09,926 INFO L87 Difference]: Start difference. First operand 1400 states and 5531 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:09,985 INFO L93 Difference]: Finished difference Result 2900 states and 10684 transitions. [2021-05-22 01:56:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:09,990 INFO L225 Difference]: With dead ends: 2900 [2021-05-22 01:56:09,991 INFO L226 Difference]: Without dead ends: 2725 [2021-05-22 01:56:09,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-05-22 01:56:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1440. [2021-05-22 01:56:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.9409312022237666) internal successors, (5671), 1439 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5671 transitions. [2021-05-22 01:56:10,031 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5671 transitions. Word has length 25 [2021-05-22 01:56:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:10,031 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 5671 transitions. [2021-05-22 01:56:10,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5671 transitions. [2021-05-22 01:56:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:10,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:10,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:10,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-05-22 01:56:10,033 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash 656419803, now seen corresponding path program 300 times [2021-05-22 01:56:10,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:10,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924741444] [2021-05-22 01:56:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:10,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924741444] [2021-05-22 01:56:10,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924741444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:10,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:10,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:10,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70361319] [2021-05-22 01:56:10,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:10,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:10,141 INFO L87 Difference]: Start difference. First operand 1440 states and 5671 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:10,199 INFO L93 Difference]: Finished difference Result 2852 states and 10484 transitions. [2021-05-22 01:56:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:10,205 INFO L225 Difference]: With dead ends: 2852 [2021-05-22 01:56:10,205 INFO L226 Difference]: Without dead ends: 2574 [2021-05-22 01:56:10,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-05-22 01:56:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 1384. [2021-05-22 01:56:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.9587852494577005) internal successors, (5475), 1383 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 5475 transitions. [2021-05-22 01:56:10,251 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 5475 transitions. Word has length 25 [2021-05-22 01:56:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:10,251 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 5475 transitions. [2021-05-22 01:56:10,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 5475 transitions. [2021-05-22 01:56:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:10,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:10,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:10,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2021-05-22 01:56:10,254 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:10,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1090089759, now seen corresponding path program 301 times [2021-05-22 01:56:10,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:10,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659822921] [2021-05-22 01:56:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659822921] [2021-05-22 01:56:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659822921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:10,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:10,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094605831] [2021-05-22 01:56:10,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:10,351 INFO L87 Difference]: Start difference. First operand 1384 states and 5475 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:10,410 INFO L93 Difference]: Finished difference Result 2710 states and 9998 transitions. [2021-05-22 01:56:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:10,416 INFO L225 Difference]: With dead ends: 2710 [2021-05-22 01:56:10,416 INFO L226 Difference]: Without dead ends: 2551 [2021-05-22 01:56:10,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-22 01:56:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 1408. [2021-05-22 01:56:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.9509594882729213) internal successors, (5559), 1407 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 5559 transitions. [2021-05-22 01:56:10,457 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 5559 transitions. Word has length 25 [2021-05-22 01:56:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:10,457 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 5559 transitions. [2021-05-22 01:56:10,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 5559 transitions. [2021-05-22 01:56:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:10,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:10,459 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:10,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2021-05-22 01:56:10,459 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1524380897, now seen corresponding path program 302 times [2021-05-22 01:56:10,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:10,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292680975] [2021-05-22 01:56:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:10,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:10,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292680975] [2021-05-22 01:56:10,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292680975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:10,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:10,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:10,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19969856] [2021-05-22 01:56:10,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:10,559 INFO L87 Difference]: Start difference. First operand 1408 states and 5559 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:10,625 INFO L93 Difference]: Finished difference Result 2734 states and 10074 transitions. [2021-05-22 01:56:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:10,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:10,630 INFO L225 Difference]: With dead ends: 2734 [2021-05-22 01:56:10,630 INFO L226 Difference]: Without dead ends: 2535 [2021-05-22 01:56:10,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-05-22 01:56:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1392. [2021-05-22 01:56:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.9561466570812365) internal successors, (5503), 1391 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5503 transitions. [2021-05-22 01:56:10,661 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5503 transitions. Word has length 25 [2021-05-22 01:56:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:10,661 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 5503 transitions. [2021-05-22 01:56:10,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5503 transitions. [2021-05-22 01:56:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:10,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:10,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:10,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2021-05-22 01:56:10,663 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash 243292797, now seen corresponding path program 303 times [2021-05-22 01:56:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178890519] [2021-05-22 01:56:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:10,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:10,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178890519] [2021-05-22 01:56:10,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178890519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:10,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:10,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:10,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632456064] [2021-05-22 01:56:10,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:10,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:10,754 INFO L87 Difference]: Start difference. First operand 1392 states and 5503 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:10,801 INFO L93 Difference]: Finished difference Result 2654 states and 9786 transitions. [2021-05-22 01:56:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:10,806 INFO L225 Difference]: With dead ends: 2654 [2021-05-22 01:56:10,806 INFO L226 Difference]: Without dead ends: 2495 [2021-05-22 01:56:10,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-05-22 01:56:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1408. [2021-05-22 01:56:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.945273631840796) internal successors, (5551), 1407 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 5551 transitions. [2021-05-22 01:56:10,837 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 5551 transitions. Word has length 25 [2021-05-22 01:56:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:10,837 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 5551 transitions. [2021-05-22 01:56:10,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 5551 transitions. [2021-05-22 01:56:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:10,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:10,839 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:10,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2021-05-22 01:56:10,839 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 885631775, now seen corresponding path program 304 times [2021-05-22 01:56:10,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:10,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416791499] [2021-05-22 01:56:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:10,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:10,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416791499] [2021-05-22 01:56:10,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416791499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:10,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:10,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:10,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410533289] [2021-05-22 01:56:10,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:10,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:10,918 INFO L87 Difference]: Start difference. First operand 1408 states and 5551 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:10,979 INFO L93 Difference]: Finished difference Result 2542 states and 9449 transitions. [2021-05-22 01:56:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:10,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:10,983 INFO L225 Difference]: With dead ends: 2542 [2021-05-22 01:56:10,983 INFO L226 Difference]: Without dead ends: 2351 [2021-05-22 01:56:10,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-22 01:56:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1392. [2021-05-22 01:56:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.9503953989935296) internal successors, (5495), 1391 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5495 transitions. [2021-05-22 01:56:11,014 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5495 transitions. Word has length 25 [2021-05-22 01:56:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:11,014 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 5495 transitions. [2021-05-22 01:56:11,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5495 transitions. [2021-05-22 01:56:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:11,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:11,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:11,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2021-05-22 01:56:11,016 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:11,016 INFO L82 PathProgramCache]: Analyzing trace with hash 263000863, now seen corresponding path program 305 times [2021-05-22 01:56:11,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:11,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786020981] [2021-05-22 01:56:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:11,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:11,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786020981] [2021-05-22 01:56:11,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786020981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:11,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:11,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:11,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485947846] [2021-05-22 01:56:11,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:11,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:11,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:11,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:11,094 INFO L87 Difference]: Start difference. First operand 1392 states and 5495 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:11,151 INFO L93 Difference]: Finished difference Result 2558 states and 9521 transitions. [2021-05-22 01:56:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:11,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:11,156 INFO L225 Difference]: With dead ends: 2558 [2021-05-22 01:56:11,156 INFO L226 Difference]: Without dead ends: 2375 [2021-05-22 01:56:11,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-05-22 01:56:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-05-22 01:56:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.9371024734982334) internal successors, (5571), 1415 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5571 transitions. [2021-05-22 01:56:11,186 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5571 transitions. Word has length 25 [2021-05-22 01:56:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:11,186 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5571 transitions. [2021-05-22 01:56:11,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5571 transitions. [2021-05-22 01:56:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:11,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:11,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:11,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2021-05-22 01:56:11,188 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:11,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1780336131, now seen corresponding path program 306 times [2021-05-22 01:56:11,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:11,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386596168] [2021-05-22 01:56:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:11,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:11,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386596168] [2021-05-22 01:56:11,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386596168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:11,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:11,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:11,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939852264] [2021-05-22 01:56:11,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:11,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:11,274 INFO L87 Difference]: Start difference. First operand 1416 states and 5571 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:11,331 INFO L93 Difference]: Finished difference Result 2374 states and 8908 transitions. [2021-05-22 01:56:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:11,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:11,335 INFO L225 Difference]: With dead ends: 2374 [2021-05-22 01:56:11,335 INFO L226 Difference]: Without dead ends: 2167 [2021-05-22 01:56:11,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-05-22 01:56:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1384. [2021-05-22 01:56:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.95589298626175) internal successors, (5471), 1383 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 5471 transitions. [2021-05-22 01:56:11,365 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 5471 transitions. Word has length 25 [2021-05-22 01:56:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:11,365 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 5471 transitions. [2021-05-22 01:56:11,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 5471 transitions. [2021-05-22 01:56:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:11,366 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:11,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:11,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-05-22 01:56:11,367 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash -829969633, now seen corresponding path program 307 times [2021-05-22 01:56:11,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:11,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327500304] [2021-05-22 01:56:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:11,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:11,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327500304] [2021-05-22 01:56:11,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327500304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:11,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:11,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511624440] [2021-05-22 01:56:11,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:11,451 INFO L87 Difference]: Start difference. First operand 1384 states and 5471 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:11,509 INFO L93 Difference]: Finished difference Result 2933 states and 10857 transitions. [2021-05-22 01:56:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:11,515 INFO L225 Difference]: With dead ends: 2933 [2021-05-22 01:56:11,515 INFO L226 Difference]: Without dead ends: 2750 [2021-05-22 01:56:11,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-05-22 01:56:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1428. [2021-05-22 01:56:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 3.9516468114926417) internal successors, (5639), 1427 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 5639 transitions. [2021-05-22 01:56:11,548 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 5639 transitions. Word has length 25 [2021-05-22 01:56:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:11,548 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 5639 transitions. [2021-05-22 01:56:11,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 5639 transitions. [2021-05-22 01:56:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:11,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:11,550 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:11,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2021-05-22 01:56:11,550 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1421660669, now seen corresponding path program 308 times [2021-05-22 01:56:11,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:11,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118439802] [2021-05-22 01:56:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:11,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118439802] [2021-05-22 01:56:11,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118439802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:11,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:11,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:11,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28232651] [2021-05-22 01:56:11,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:11,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:11,635 INFO L87 Difference]: Start difference. First operand 1428 states and 5639 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:11,694 INFO L93 Difference]: Finished difference Result 2925 states and 10805 transitions. [2021-05-22 01:56:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:11,700 INFO L225 Difference]: With dead ends: 2925 [2021-05-22 01:56:11,700 INFO L226 Difference]: Without dead ends: 2726 [2021-05-22 01:56:11,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-05-22 01:56:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1404. [2021-05-22 01:56:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9565217391304346) internal successors, (5551), 1403 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5551 transitions. [2021-05-22 01:56:11,732 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5551 transitions. Word has length 25 [2021-05-22 01:56:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:11,732 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5551 transitions. [2021-05-22 01:56:11,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5551 transitions. [2021-05-22 01:56:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:11,734 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:11,734 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:11,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2021-05-22 01:56:11,734 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1643962237, now seen corresponding path program 309 times [2021-05-22 01:56:11,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:11,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566801432] [2021-05-22 01:56:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:11,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:11,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566801432] [2021-05-22 01:56:11,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566801432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:11,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:11,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:11,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356779615] [2021-05-22 01:56:11,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:11,827 INFO L87 Difference]: Start difference. First operand 1404 states and 5551 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:11,889 INFO L93 Difference]: Finished difference Result 2861 states and 10569 transitions. [2021-05-22 01:56:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:11,894 INFO L225 Difference]: With dead ends: 2861 [2021-05-22 01:56:11,894 INFO L226 Difference]: Without dead ends: 2678 [2021-05-22 01:56:11,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-05-22 01:56:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 1448. [2021-05-22 01:56:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9412577747062887) internal successors, (5703), 1447 states have internal predecessors, (5703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5703 transitions. [2021-05-22 01:56:11,926 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5703 transitions. Word has length 25 [2021-05-22 01:56:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:11,926 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5703 transitions. [2021-05-22 01:56:11,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5703 transitions. [2021-05-22 01:56:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:11,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:11,928 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:11,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-05-22 01:56:11,928 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:11,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1933437059, now seen corresponding path program 310 times [2021-05-22 01:56:11,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:11,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677017212] [2021-05-22 01:56:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:12,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:12,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677017212] [2021-05-22 01:56:12,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677017212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:12,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:12,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202147444] [2021-05-22 01:56:12,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:12,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:12,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:12,022 INFO L87 Difference]: Start difference. First operand 1448 states and 5703 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:12,073 INFO L93 Difference]: Finished difference Result 2900 states and 10672 transitions. [2021-05-22 01:56:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:12,078 INFO L225 Difference]: With dead ends: 2900 [2021-05-22 01:56:12,079 INFO L226 Difference]: Without dead ends: 2634 [2021-05-22 01:56:12,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-05-22 01:56:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 1404. [2021-05-22 01:56:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9422665716322167) internal successors, (5531), 1403 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5531 transitions. [2021-05-22 01:56:12,110 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5531 transitions. Word has length 25 [2021-05-22 01:56:12,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:12,110 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5531 transitions. [2021-05-22 01:56:12,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5531 transitions. [2021-05-22 01:56:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:12,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:12,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:12,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-05-22 01:56:12,112 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1668657445, now seen corresponding path program 311 times [2021-05-22 01:56:12,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:12,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572100733] [2021-05-22 01:56:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:12,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572100733] [2021-05-22 01:56:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572100733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:12,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:12,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336168018] [2021-05-22 01:56:12,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:12,208 INFO L87 Difference]: Start difference. First operand 1404 states and 5531 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:12,270 INFO L93 Difference]: Finished difference Result 2801 states and 10313 transitions. [2021-05-22 01:56:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:12,275 INFO L225 Difference]: With dead ends: 2801 [2021-05-22 01:56:12,275 INFO L226 Difference]: Without dead ends: 2626 [2021-05-22 01:56:12,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-22 01:56:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1444. [2021-05-22 01:56:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.93000693000693) internal successors, (5671), 1443 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5671 transitions. [2021-05-22 01:56:12,307 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5671 transitions. Word has length 25 [2021-05-22 01:56:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 5671 transitions. [2021-05-22 01:56:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5671 transitions. [2021-05-22 01:56:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:12,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:12,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:12,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2021-05-22 01:56:12,309 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1450305859, now seen corresponding path program 312 times [2021-05-22 01:56:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:12,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81438659] [2021-05-22 01:56:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:12,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:12,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81438659] [2021-05-22 01:56:12,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81438659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:12,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:12,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:12,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868469044] [2021-05-22 01:56:12,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:12,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:12,402 INFO L87 Difference]: Start difference. First operand 1444 states and 5671 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:12,458 INFO L93 Difference]: Finished difference Result 2753 states and 10113 transitions. [2021-05-22 01:56:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:12,463 INFO L225 Difference]: With dead ends: 2753 [2021-05-22 01:56:12,463 INFO L226 Difference]: Without dead ends: 2463 [2021-05-22 01:56:12,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-05-22 01:56:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1376. [2021-05-22 01:56:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.9614545454545453) internal successors, (5447), 1375 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 5447 transitions. [2021-05-22 01:56:12,494 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 5447 transitions. Word has length 25 [2021-05-22 01:56:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:12,494 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 5447 transitions. [2021-05-22 01:56:12,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 5447 transitions. [2021-05-22 01:56:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:12,496 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:12,496 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:12,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-05-22 01:56:12,496 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:12,496 INFO L82 PathProgramCache]: Analyzing trace with hash -772928521, now seen corresponding path program 313 times [2021-05-22 01:56:12,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:12,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002377276] [2021-05-22 01:56:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:12,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002377276] [2021-05-22 01:56:12,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002377276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:12,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:12,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:12,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218233621] [2021-05-22 01:56:12,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:12,580 INFO L87 Difference]: Start difference. First operand 1376 states and 5447 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:12,629 INFO L93 Difference]: Finished difference Result 2713 states and 10002 transitions. [2021-05-22 01:56:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:12,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:12,634 INFO L225 Difference]: With dead ends: 2713 [2021-05-22 01:56:12,634 INFO L226 Difference]: Without dead ends: 2554 [2021-05-22 01:56:12,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-05-22 01:56:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1404. [2021-05-22 01:56:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9565217391304346) internal successors, (5551), 1403 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5551 transitions. [2021-05-22 01:56:12,666 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5551 transitions. Word has length 25 [2021-05-22 01:56:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:12,666 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5551 transitions. [2021-05-22 01:56:12,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5551 transitions. [2021-05-22 01:56:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:12,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:12,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:12,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-05-22 01:56:12,668 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1932104025, now seen corresponding path program 314 times [2021-05-22 01:56:12,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:12,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025054707] [2021-05-22 01:56:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:12,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:12,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025054707] [2021-05-22 01:56:12,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025054707] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:12,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:12,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:12,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160975053] [2021-05-22 01:56:12,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:12,749 INFO L87 Difference]: Start difference. First operand 1404 states and 5551 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:12,819 INFO L93 Difference]: Finished difference Result 2743 states and 10095 transitions. [2021-05-22 01:56:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:12,824 INFO L225 Difference]: With dead ends: 2743 [2021-05-22 01:56:12,824 INFO L226 Difference]: Without dead ends: 2538 [2021-05-22 01:56:12,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-05-22 01:56:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1388. [2021-05-22 01:56:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.9617880317231435) internal successors, (5495), 1387 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5495 transitions. [2021-05-22 01:56:12,855 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5495 transitions. Word has length 25 [2021-05-22 01:56:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:12,855 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5495 transitions. [2021-05-22 01:56:12,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5495 transitions. [2021-05-22 01:56:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:12,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:12,857 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:12,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-05-22 01:56:12,857 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash -979736487, now seen corresponding path program 315 times [2021-05-22 01:56:12,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:12,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231174276] [2021-05-22 01:56:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:12,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231174276] [2021-05-22 01:56:12,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231174276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:12,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:12,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:12,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362358415] [2021-05-22 01:56:12,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:12,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:12,933 INFO L87 Difference]: Start difference. First operand 1388 states and 5495 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:12,987 INFO L93 Difference]: Finished difference Result 2707 states and 9977 transitions. [2021-05-22 01:56:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:12,992 INFO L225 Difference]: With dead ends: 2707 [2021-05-22 01:56:12,992 INFO L226 Difference]: Without dead ends: 2548 [2021-05-22 01:56:12,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-05-22 01:56:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 1404. [2021-05-22 01:56:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9508196721311477) internal successors, (5543), 1403 states have internal predecessors, (5543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5543 transitions. [2021-05-22 01:56:13,023 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5543 transitions. Word has length 25 [2021-05-22 01:56:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:13,023 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5543 transitions. [2021-05-22 01:56:13,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5543 transitions. [2021-05-22 01:56:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:13,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:13,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:13,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2021-05-22 01:56:13,025 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 700760153, now seen corresponding path program 316 times [2021-05-22 01:56:13,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:13,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765960583] [2021-05-22 01:56:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:13,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:13,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765960583] [2021-05-22 01:56:13,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765960583] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:13,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:13,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413433125] [2021-05-22 01:56:13,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:13,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:13,098 INFO L87 Difference]: Start difference. First operand 1404 states and 5543 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:13,168 INFO L93 Difference]: Finished difference Result 2731 states and 10053 transitions. [2021-05-22 01:56:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:13,173 INFO L225 Difference]: With dead ends: 2731 [2021-05-22 01:56:13,173 INFO L226 Difference]: Without dead ends: 2532 [2021-05-22 01:56:13,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-05-22 01:56:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1388. [2021-05-22 01:56:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.9560201874549388) internal successors, (5487), 1387 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5487 transitions. [2021-05-22 01:56:13,205 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5487 transitions. Word has length 25 [2021-05-22 01:56:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:13,205 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5487 transitions. [2021-05-22 01:56:13,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5487 transitions. [2021-05-22 01:56:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:13,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:13,207 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:13,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2021-05-22 01:56:13,207 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 437425467, now seen corresponding path program 317 times [2021-05-22 01:56:13,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:13,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301784774] [2021-05-22 01:56:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:13,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:13,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301784774] [2021-05-22 01:56:13,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301784774] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:13,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:13,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676514894] [2021-05-22 01:56:13,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:13,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:13,279 INFO L87 Difference]: Start difference. First operand 1388 states and 5487 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:13,344 INFO L93 Difference]: Finished difference Result 2779 states and 10239 transitions. [2021-05-22 01:56:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:13,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:13,349 INFO L225 Difference]: With dead ends: 2779 [2021-05-22 01:56:13,349 INFO L226 Difference]: Without dead ends: 2590 [2021-05-22 01:56:13,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-05-22 01:56:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 1416. [2021-05-22 01:56:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.939929328621908) internal successors, (5575), 1415 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5575 transitions. [2021-05-22 01:56:13,385 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5575 transitions. Word has length 25 [2021-05-22 01:56:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:13,385 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5575 transitions. [2021-05-22 01:56:13,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5575 transitions. [2021-05-22 01:56:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:13,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:13,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:13,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-05-22 01:56:13,387 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash -954719079, now seen corresponding path program 318 times [2021-05-22 01:56:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:13,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516088566] [2021-05-22 01:56:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:13,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516088566] [2021-05-22 01:56:13,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516088566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:13,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:13,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:13,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829376248] [2021-05-22 01:56:13,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:13,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:13,460 INFO L87 Difference]: Start difference. First operand 1416 states and 5575 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:13,523 INFO L93 Difference]: Finished difference Result 2773 states and 10194 transitions. [2021-05-22 01:56:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:13,528 INFO L225 Difference]: With dead ends: 2773 [2021-05-22 01:56:13,528 INFO L226 Difference]: Without dead ends: 2554 [2021-05-22 01:56:13,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-05-22 01:56:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1380. [2021-05-22 01:56:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.9615663524292968) internal successors, (5463), 1379 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5463 transitions. [2021-05-22 01:56:13,560 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5463 transitions. Word has length 25 [2021-05-22 01:56:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:13,560 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5463 transitions. [2021-05-22 01:56:13,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5463 transitions. [2021-05-22 01:56:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:13,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:13,562 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:13,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2021-05-22 01:56:13,562 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1253830567, now seen corresponding path program 319 times [2021-05-22 01:56:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:13,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985119721] [2021-05-22 01:56:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:13,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:13,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985119721] [2021-05-22 01:56:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985119721] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:13,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:13,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:13,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822072140] [2021-05-22 01:56:13,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:13,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:13,651 INFO L87 Difference]: Start difference. First operand 1380 states and 5463 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:13,700 INFO L93 Difference]: Finished difference Result 2677 states and 9854 transitions. [2021-05-22 01:56:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:13,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:13,705 INFO L225 Difference]: With dead ends: 2677 [2021-05-22 01:56:13,705 INFO L226 Difference]: Without dead ends: 2518 [2021-05-22 01:56:13,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-05-22 01:56:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1404. [2021-05-22 01:56:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9536707056307914) internal successors, (5547), 1403 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5547 transitions. [2021-05-22 01:56:13,738 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5547 transitions. Word has length 25 [2021-05-22 01:56:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:13,738 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5547 transitions. [2021-05-22 01:56:13,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5547 transitions. [2021-05-22 01:56:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:13,740 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:13,740 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:13,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-05-22 01:56:13,740 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1451201979, now seen corresponding path program 320 times [2021-05-22 01:56:13,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:13,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686318843] [2021-05-22 01:56:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:13,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:13,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686318843] [2021-05-22 01:56:13,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686318843] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:13,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:13,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:13,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866137275] [2021-05-22 01:56:13,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:13,829 INFO L87 Difference]: Start difference. First operand 1404 states and 5547 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:13,898 INFO L93 Difference]: Finished difference Result 2707 states and 9947 transitions. [2021-05-22 01:56:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:13,903 INFO L225 Difference]: With dead ends: 2707 [2021-05-22 01:56:13,904 INFO L226 Difference]: Without dead ends: 2502 [2021-05-22 01:56:13,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-05-22 01:56:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1388. [2021-05-22 01:56:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.958904109589041) internal successors, (5491), 1387 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5491 transitions. [2021-05-22 01:56:13,936 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5491 transitions. Word has length 25 [2021-05-22 01:56:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:13,936 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5491 transitions. [2021-05-22 01:56:13,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5491 transitions. [2021-05-22 01:56:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:13,938 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:13,938 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:13,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2021-05-22 01:56:13,938 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 65019865, now seen corresponding path program 321 times [2021-05-22 01:56:13,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:13,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200404856] [2021-05-22 01:56:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:14,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:14,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200404856] [2021-05-22 01:56:14,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200404856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:14,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:14,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:14,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954023825] [2021-05-22 01:56:14,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:14,021 INFO L87 Difference]: Start difference. First operand 1388 states and 5491 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:14,073 INFO L93 Difference]: Finished difference Result 2631 states and 9689 transitions. [2021-05-22 01:56:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:14,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:14,078 INFO L225 Difference]: With dead ends: 2631 [2021-05-22 01:56:14,078 INFO L226 Difference]: Without dead ends: 2472 [2021-05-22 01:56:14,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-05-22 01:56:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 1404. [2021-05-22 01:56:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.947968638631504) internal successors, (5539), 1403 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5539 transitions. [2021-05-22 01:56:14,110 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5539 transitions. Word has length 25 [2021-05-22 01:56:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:14,110 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5539 transitions. [2021-05-22 01:56:14,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5539 transitions. [2021-05-22 01:56:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:14,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:14,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:14,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2021-05-22 01:56:14,112 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1877252135, now seen corresponding path program 322 times [2021-05-22 01:56:14,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:14,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090004976] [2021-05-22 01:56:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:14,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:14,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090004976] [2021-05-22 01:56:14,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090004976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:14,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:14,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:14,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841886202] [2021-05-22 01:56:14,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:14,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:14,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:14,197 INFO L87 Difference]: Start difference. First operand 1404 states and 5539 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:14,261 INFO L93 Difference]: Finished difference Result 2519 states and 9352 transitions. [2021-05-22 01:56:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:14,266 INFO L225 Difference]: With dead ends: 2519 [2021-05-22 01:56:14,266 INFO L226 Difference]: Without dead ends: 2328 [2021-05-22 01:56:14,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-22 01:56:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1388. [2021-05-22 01:56:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.953136265320836) internal successors, (5483), 1387 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5483 transitions. [2021-05-22 01:56:14,297 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5483 transitions. Word has length 25 [2021-05-22 01:56:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:14,297 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5483 transitions. [2021-05-22 01:56:14,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5483 transitions. [2021-05-22 01:56:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:14,299 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:14,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:14,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2021-05-22 01:56:14,299 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1482181819, now seen corresponding path program 323 times [2021-05-22 01:56:14,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:14,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282595505] [2021-05-22 01:56:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:14,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:14,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282595505] [2021-05-22 01:56:14,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282595505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:14,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:14,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:14,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949586983] [2021-05-22 01:56:14,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:14,397 INFO L87 Difference]: Start difference. First operand 1388 states and 5483 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:14,475 INFO L93 Difference]: Finished difference Result 2669 states and 9826 transitions. [2021-05-22 01:56:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:14,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:14,480 INFO L225 Difference]: With dead ends: 2669 [2021-05-22 01:56:14,480 INFO L226 Difference]: Without dead ends: 2480 [2021-05-22 01:56:14,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-05-22 01:56:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 1412. [2021-05-22 01:56:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.9397590361445785) internal successors, (5559), 1411 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5559 transitions. [2021-05-22 01:56:14,513 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5559 transitions. Word has length 25 [2021-05-22 01:56:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:14,513 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5559 transitions. [2021-05-22 01:56:14,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5559 transitions. [2021-05-22 01:56:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:14,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:14,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:14,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2021-05-22 01:56:14,515 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash 741229721, now seen corresponding path program 324 times [2021-05-22 01:56:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:14,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380713073] [2021-05-22 01:56:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:14,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:14,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380713073] [2021-05-22 01:56:14,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380713073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:14,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:14,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:14,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280961199] [2021-05-22 01:56:14,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:14,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:14,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:14,630 INFO L87 Difference]: Start difference. First operand 1412 states and 5559 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:14,693 INFO L93 Difference]: Finished difference Result 2527 states and 9372 transitions. [2021-05-22 01:56:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:14,698 INFO L225 Difference]: With dead ends: 2527 [2021-05-22 01:56:14,698 INFO L226 Difference]: Without dead ends: 2320 [2021-05-22 01:56:14,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-05-22 01:56:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1380. [2021-05-22 01:56:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.958665699782451) internal successors, (5459), 1379 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5459 transitions. [2021-05-22 01:56:14,729 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5459 transitions. Word has length 25 [2021-05-22 01:56:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:14,729 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5459 transitions. [2021-05-22 01:56:14,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5459 transitions. [2021-05-22 01:56:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:14,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:14,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:14,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2021-05-22 01:56:14,731 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1448213435, now seen corresponding path program 325 times [2021-05-22 01:56:14,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:14,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66839267] [2021-05-22 01:56:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:14,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:14,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66839267] [2021-05-22 01:56:14,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66839267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:14,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:14,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483923280] [2021-05-22 01:56:14,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:14,811 INFO L87 Difference]: Start difference. First operand 1380 states and 5459 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:14,858 INFO L93 Difference]: Finished difference Result 2633 states and 9704 transitions. [2021-05-22 01:56:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:14,863 INFO L225 Difference]: With dead ends: 2633 [2021-05-22 01:56:14,863 INFO L226 Difference]: Without dead ends: 2474 [2021-05-22 01:56:14,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-05-22 01:56:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1404. [2021-05-22 01:56:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9508196721311477) internal successors, (5543), 1403 states have internal predecessors, (5543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5543 transitions. [2021-05-22 01:56:14,896 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5543 transitions. Word has length 25 [2021-05-22 01:56:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:14,896 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5543 transitions. [2021-05-22 01:56:14,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5543 transitions. [2021-05-22 01:56:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:14,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:14,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:14,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2021-05-22 01:56:14,898 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:14,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1166257221, now seen corresponding path program 326 times [2021-05-22 01:56:14,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:14,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767208028] [2021-05-22 01:56:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:14,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:14,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767208028] [2021-05-22 01:56:14,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767208028] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:14,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:14,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637381472] [2021-05-22 01:56:14,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:14,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:14,999 INFO L87 Difference]: Start difference. First operand 1404 states and 5543 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:15,061 INFO L93 Difference]: Finished difference Result 2657 states and 9780 transitions. [2021-05-22 01:56:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:15,066 INFO L225 Difference]: With dead ends: 2657 [2021-05-22 01:56:15,066 INFO L226 Difference]: Without dead ends: 2458 [2021-05-22 01:56:15,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-05-22 01:56:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1388. [2021-05-22 01:56:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.9560201874549388) internal successors, (5487), 1387 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5487 transitions. [2021-05-22 01:56:15,098 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5487 transitions. Word has length 25 [2021-05-22 01:56:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:15,098 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5487 transitions. [2021-05-22 01:56:15,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5487 transitions. [2021-05-22 01:56:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:15,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:15,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:15,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2021-05-22 01:56:15,100 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 601416473, now seen corresponding path program 327 times [2021-05-22 01:56:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:15,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446802820] [2021-05-22 01:56:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:15,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:15,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446802820] [2021-05-22 01:56:15,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446802820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:15,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:15,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:15,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047650072] [2021-05-22 01:56:15,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:15,176 INFO L87 Difference]: Start difference. First operand 1388 states and 5487 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:15,229 INFO L93 Difference]: Finished difference Result 2577 states and 9492 transitions. [2021-05-22 01:56:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:15,233 INFO L225 Difference]: With dead ends: 2577 [2021-05-22 01:56:15,233 INFO L226 Difference]: Without dead ends: 2418 [2021-05-22 01:56:15,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-05-22 01:56:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1404. [2021-05-22 01:56:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.9451176051318604) internal successors, (5535), 1403 states have internal predecessors, (5535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 5535 transitions. [2021-05-22 01:56:15,265 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 5535 transitions. Word has length 25 [2021-05-22 01:56:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:15,265 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 5535 transitions. [2021-05-22 01:56:15,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 5535 transitions. [2021-05-22 01:56:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:15,267 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:15,267 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:15,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2021-05-22 01:56:15,267 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:15,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1243755451, now seen corresponding path program 328 times [2021-05-22 01:56:15,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:15,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520014614] [2021-05-22 01:56:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:15,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:15,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520014614] [2021-05-22 01:56:15,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520014614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:15,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:15,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:15,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540471728] [2021-05-22 01:56:15,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:15,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:15,342 INFO L87 Difference]: Start difference. First operand 1404 states and 5535 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:15,401 INFO L93 Difference]: Finished difference Result 2465 states and 9155 transitions. [2021-05-22 01:56:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:15,406 INFO L225 Difference]: With dead ends: 2465 [2021-05-22 01:56:15,406 INFO L226 Difference]: Without dead ends: 2274 [2021-05-22 01:56:15,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-05-22 01:56:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1388. [2021-05-22 01:56:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.950252343186734) internal successors, (5479), 1387 states have internal predecessors, (5479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 5479 transitions. [2021-05-22 01:56:15,436 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 5479 transitions. Word has length 25 [2021-05-22 01:56:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:15,436 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 5479 transitions. [2021-05-22 01:56:15,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 5479 transitions. [2021-05-22 01:56:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:15,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:15,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:15,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2021-05-22 01:56:15,438 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash 621124539, now seen corresponding path program 329 times [2021-05-22 01:56:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:15,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629981805] [2021-05-22 01:56:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:15,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:15,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629981805] [2021-05-22 01:56:15,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629981805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:15,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:15,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:15,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608919176] [2021-05-22 01:56:15,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:15,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:15,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:15,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:15,513 INFO L87 Difference]: Start difference. First operand 1388 states and 5479 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:15,577 INFO L93 Difference]: Finished difference Result 2481 states and 9227 transitions. [2021-05-22 01:56:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:15,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:15,582 INFO L225 Difference]: With dead ends: 2481 [2021-05-22 01:56:15,582 INFO L226 Difference]: Without dead ends: 2298 [2021-05-22 01:56:15,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-05-22 01:56:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1412. [2021-05-22 01:56:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.9369241672572644) internal successors, (5555), 1411 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5555 transitions. [2021-05-22 01:56:15,613 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5555 transitions. Word has length 25 [2021-05-22 01:56:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:15,613 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5555 transitions. [2021-05-22 01:56:15,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5555 transitions. [2021-05-22 01:56:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:15,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:15,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:15,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-05-22 01:56:15,615 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1422212455, now seen corresponding path program 330 times [2021-05-22 01:56:15,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:15,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148185711] [2021-05-22 01:56:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:15,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:15,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148185711] [2021-05-22 01:56:15,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148185711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:15,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:15,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:15,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375717677] [2021-05-22 01:56:15,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:15,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:15,704 INFO L87 Difference]: Start difference. First operand 1412 states and 5555 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:15,776 INFO L93 Difference]: Finished difference Result 2297 states and 8614 transitions. [2021-05-22 01:56:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:15,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:15,781 INFO L225 Difference]: With dead ends: 2297 [2021-05-22 01:56:15,781 INFO L226 Difference]: Without dead ends: 2090 [2021-05-22 01:56:15,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-05-22 01:56:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1380. [2021-05-22 01:56:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.9557650471356056) internal successors, (5455), 1379 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5455 transitions. [2021-05-22 01:56:15,811 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5455 transitions. Word has length 25 [2021-05-22 01:56:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:15,811 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5455 transitions. [2021-05-22 01:56:15,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5455 transitions. [2021-05-22 01:56:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:15,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:15,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:15,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-05-22 01:56:15,813 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2122649571, now seen corresponding path program 331 times [2021-05-22 01:56:15,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:15,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333990169] [2021-05-22 01:56:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:15,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333990169] [2021-05-22 01:56:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333990169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:15,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:15,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367811655] [2021-05-22 01:56:15,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:15,887 INFO L87 Difference]: Start difference. First operand 1380 states and 5455 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:15,946 INFO L93 Difference]: Finished difference Result 2717 states and 10026 transitions. [2021-05-22 01:56:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:15,951 INFO L225 Difference]: With dead ends: 2717 [2021-05-22 01:56:15,951 INFO L226 Difference]: Without dead ends: 2528 [2021-05-22 01:56:15,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-05-22 01:56:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1420. [2021-05-22 01:56:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.945736434108527) internal successors, (5599), 1419 states have internal predecessors, (5599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 5599 transitions. [2021-05-22 01:56:15,984 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 5599 transitions. Word has length 25 [2021-05-22 01:56:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 5599 transitions. [2021-05-22 01:56:15,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 5599 transitions. [2021-05-22 01:56:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:15,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:15,986 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:15,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2021-05-22 01:56:15,987 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash 780173179, now seen corresponding path program 332 times [2021-05-22 01:56:15,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:15,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086672037] [2021-05-22 01:56:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:16,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:16,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086672037] [2021-05-22 01:56:16,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086672037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:16,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:16,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:16,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982683791] [2021-05-22 01:56:16,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:16,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:16,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:16,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:16,061 INFO L87 Difference]: Start difference. First operand 1420 states and 5599 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:16,121 INFO L93 Difference]: Finished difference Result 2711 states and 9981 transitions. [2021-05-22 01:56:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:16,126 INFO L225 Difference]: With dead ends: 2711 [2021-05-22 01:56:16,126 INFO L226 Difference]: Without dead ends: 2500 [2021-05-22 01:56:16,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-05-22 01:56:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1392. [2021-05-22 01:56:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.953271028037383) internal successors, (5499), 1391 states have internal predecessors, (5499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5499 transitions. [2021-05-22 01:56:16,159 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5499 transitions. Word has length 25 [2021-05-22 01:56:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:16,159 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 5499 transitions. [2021-05-22 01:56:16,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5499 transitions. [2021-05-22 01:56:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:16,161 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:16,161 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:16,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-05-22 01:56:16,161 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:16,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1325520763, now seen corresponding path program 333 times [2021-05-22 01:56:16,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:16,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58225802] [2021-05-22 01:56:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:16,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:16,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58225802] [2021-05-22 01:56:16,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58225802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:16,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:16,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847143241] [2021-05-22 01:56:16,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:16,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:16,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:16,246 INFO L87 Difference]: Start difference. First operand 1392 states and 5499 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:16,306 INFO L93 Difference]: Finished difference Result 2619 states and 9649 transitions. [2021-05-22 01:56:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:16,311 INFO L225 Difference]: With dead ends: 2619 [2021-05-22 01:56:16,311 INFO L226 Difference]: Without dead ends: 2430 [2021-05-22 01:56:16,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-05-22 01:56:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1416. [2021-05-22 01:56:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.939929328621908) internal successors, (5575), 1415 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5575 transitions. [2021-05-22 01:56:16,343 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5575 transitions. Word has length 25 [2021-05-22 01:56:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:16,343 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5575 transitions. [2021-05-22 01:56:16,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5575 transitions. [2021-05-22 01:56:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:16,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:16,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:16,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2021-05-22 01:56:16,345 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:16,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1125787653, now seen corresponding path program 334 times [2021-05-22 01:56:16,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:16,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504245591] [2021-05-22 01:56:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:16,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:16,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504245591] [2021-05-22 01:56:16,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504245591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:16,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:16,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:16,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213983074] [2021-05-22 01:56:16,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:16,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:16,429 INFO L87 Difference]: Start difference. First operand 1416 states and 5575 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:16,493 INFO L93 Difference]: Finished difference Result 2477 states and 9195 transitions. [2021-05-22 01:56:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:16,498 INFO L225 Difference]: With dead ends: 2477 [2021-05-22 01:56:16,498 INFO L226 Difference]: Without dead ends: 2278 [2021-05-22 01:56:16,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-05-22 01:56:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1392. [2021-05-22 01:56:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.9446441409058233) internal successors, (5487), 1391 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5487 transitions. [2021-05-22 01:56:16,528 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5487 transitions. Word has length 25 [2021-05-22 01:56:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:16,528 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 5487 transitions. [2021-05-22 01:56:16,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5487 transitions. [2021-05-22 01:56:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:16,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:16,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:16,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2021-05-22 01:56:16,530 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1689778137, now seen corresponding path program 335 times [2021-05-22 01:56:16,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:16,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206771582] [2021-05-22 01:56:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:16,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206771582] [2021-05-22 01:56:16,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206771582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:16,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:16,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338353569] [2021-05-22 01:56:16,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:16,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:16,617 INFO L87 Difference]: Start difference. First operand 1392 states and 5487 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:16,685 INFO L93 Difference]: Finished difference Result 2485 states and 9235 transitions. [2021-05-22 01:56:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:16,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:16,690 INFO L225 Difference]: With dead ends: 2485 [2021-05-22 01:56:16,690 INFO L226 Difference]: Without dead ends: 2302 [2021-05-22 01:56:16,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-05-22 01:56:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1416. [2021-05-22 01:56:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.9314487632508834) internal successors, (5563), 1415 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5563 transitions. [2021-05-22 01:56:16,720 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5563 transitions. Word has length 25 [2021-05-22 01:56:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:16,720 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 5563 transitions. [2021-05-22 01:56:16,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5563 transitions. [2021-05-22 01:56:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:16,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:16,722 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:16,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2021-05-22 01:56:16,722 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1524126533, now seen corresponding path program 336 times [2021-05-22 01:56:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:16,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503603238] [2021-05-22 01:56:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:16,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:16,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503603238] [2021-05-22 01:56:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503603238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:16,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:16,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:16,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938987883] [2021-05-22 01:56:16,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:16,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:16,808 INFO L87 Difference]: Start difference. First operand 1416 states and 5563 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:16,877 INFO L93 Difference]: Finished difference Result 2301 states and 8622 transitions. [2021-05-22 01:56:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:16,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:16,881 INFO L225 Difference]: With dead ends: 2301 [2021-05-22 01:56:16,881 INFO L226 Difference]: Without dead ends: 2086 [2021-05-22 01:56:16,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-05-22 01:56:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1376. [2021-05-22 01:56:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.96) internal successors, (5445), 1375 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 5445 transitions. [2021-05-22 01:56:16,910 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 5445 transitions. Word has length 25 [2021-05-22 01:56:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:16,910 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 5445 transitions. [2021-05-22 01:56:16,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 5445 transitions. [2021-05-22 01:56:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:16,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:16,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:16,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2021-05-22 01:56:16,912 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash 203920639, now seen corresponding path program 337 times [2021-05-22 01:56:16,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:16,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093938445] [2021-05-22 01:56:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:16,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:16,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093938445] [2021-05-22 01:56:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093938445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:16,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:16,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513701841] [2021-05-22 01:56:16,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:16,985 INFO L87 Difference]: Start difference. First operand 1376 states and 5445 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:17,052 INFO L93 Difference]: Finished difference Result 3065 states and 11402 transitions. [2021-05-22 01:56:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:17,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:17,057 INFO L225 Difference]: With dead ends: 3065 [2021-05-22 01:56:17,057 INFO L226 Difference]: Without dead ends: 2876 [2021-05-22 01:56:17,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-05-22 01:56:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1430. [2021-05-22 01:56:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.9580125962211334) internal successors, (5656), 1429 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 5656 transitions. [2021-05-22 01:56:17,103 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 5656 transitions. Word has length 25 [2021-05-22 01:56:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:17,103 INFO L482 AbstractCegarLoop]: Abstraction has 1430 states and 5656 transitions. [2021-05-22 01:56:17,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 5656 transitions. [2021-05-22 01:56:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:17,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:17,105 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:17,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2021-05-22 01:56:17,105 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1188223907, now seen corresponding path program 338 times [2021-05-22 01:56:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:17,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20578160] [2021-05-22 01:56:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:17,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20578160] [2021-05-22 01:56:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20578160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:17,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:17,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:17,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843188450] [2021-05-22 01:56:17,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:17,180 INFO L87 Difference]: Start difference. First operand 1430 states and 5656 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:17,243 INFO L93 Difference]: Finished difference Result 3059 states and 11357 transitions. [2021-05-22 01:56:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:17,249 INFO L225 Difference]: With dead ends: 3059 [2021-05-22 01:56:17,249 INFO L226 Difference]: Without dead ends: 2848 [2021-05-22 01:56:17,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-05-22 01:56:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1402. [2021-05-22 01:56:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.9657387580299788) internal successors, (5556), 1401 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 5556 transitions. [2021-05-22 01:56:17,283 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 5556 transitions. Word has length 25 [2021-05-22 01:56:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:17,283 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 5556 transitions. [2021-05-22 01:56:17,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 5556 transitions. [2021-05-22 01:56:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:17,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:17,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:17,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2021-05-22 01:56:17,285 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -642876323, now seen corresponding path program 339 times [2021-05-22 01:56:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:17,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565047822] [2021-05-22 01:56:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:17,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:17,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565047822] [2021-05-22 01:56:17,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565047822] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:17,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:17,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:17,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761756944] [2021-05-22 01:56:17,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:17,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:17,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:17,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:17,372 INFO L87 Difference]: Start difference. First operand 1402 states and 5556 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:17,438 INFO L93 Difference]: Finished difference Result 3053 states and 11346 transitions. [2021-05-22 01:56:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:17,444 INFO L225 Difference]: With dead ends: 3053 [2021-05-22 01:56:17,444 INFO L226 Difference]: Without dead ends: 2864 [2021-05-22 01:56:17,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-05-22 01:56:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 1426. [2021-05-22 01:56:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.952280701754386) internal successors, (5632), 1425 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5632 transitions. [2021-05-22 01:56:17,479 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5632 transitions. Word has length 25 [2021-05-22 01:56:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:17,479 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 5632 transitions. [2021-05-22 01:56:17,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5632 transitions. [2021-05-22 01:56:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:17,481 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:17,481 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:17,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2021-05-22 01:56:17,481 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1200782557, now seen corresponding path program 340 times [2021-05-22 01:56:17,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:17,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973882930] [2021-05-22 01:56:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:17,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:17,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973882930] [2021-05-22 01:56:17,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973882930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:17,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:17,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181824660] [2021-05-22 01:56:17,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:17,584 INFO L87 Difference]: Start difference. First operand 1426 states and 5632 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:17,652 INFO L93 Difference]: Finished difference Result 3039 states and 11277 transitions. [2021-05-22 01:56:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:17,657 INFO L225 Difference]: With dead ends: 3039 [2021-05-22 01:56:17,657 INFO L226 Difference]: Without dead ends: 2840 [2021-05-22 01:56:17,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-05-22 01:56:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 1402. [2021-05-22 01:56:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.9571734475374734) internal successors, (5544), 1401 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 5544 transitions. [2021-05-22 01:56:17,691 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 5544 transitions. Word has length 25 [2021-05-22 01:56:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:17,691 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 5544 transitions. [2021-05-22 01:56:17,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 5544 transitions. [2021-05-22 01:56:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:17,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:17,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:17,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-05-22 01:56:17,693 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash -278618949, now seen corresponding path program 341 times [2021-05-22 01:56:17,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:17,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728576055] [2021-05-22 01:56:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:17,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:17,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728576055] [2021-05-22 01:56:17,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728576055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:17,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:17,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746414686] [2021-05-22 01:56:17,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:17,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:17,787 INFO L87 Difference]: Start difference. First operand 1402 states and 5544 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:17,868 INFO L93 Difference]: Finished difference Result 3041 states and 11300 transitions. [2021-05-22 01:56:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:17,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:17,875 INFO L225 Difference]: With dead ends: 3041 [2021-05-22 01:56:17,875 INFO L226 Difference]: Without dead ends: 2858 [2021-05-22 01:56:17,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-05-22 01:56:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 1426. [2021-05-22 01:56:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.943859649122807) internal successors, (5620), 1425 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5620 transitions. [2021-05-22 01:56:17,924 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5620 transitions. Word has length 25 [2021-05-22 01:56:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:17,925 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 5620 transitions. [2021-05-22 01:56:17,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5620 transitions. [2021-05-22 01:56:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:17,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:17,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:17,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2021-05-22 01:56:17,927 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash 802443677, now seen corresponding path program 342 times [2021-05-22 01:56:17,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:17,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596433894] [2021-05-22 01:56:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:18,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596433894] [2021-05-22 01:56:18,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596433894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:18,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:18,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:18,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462502308] [2021-05-22 01:56:18,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:18,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:18,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:18,017 INFO L87 Difference]: Start difference. First operand 1426 states and 5620 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:18,099 INFO L93 Difference]: Finished difference Result 3033 states and 11248 transitions. [2021-05-22 01:56:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:18,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:18,106 INFO L225 Difference]: With dead ends: 3033 [2021-05-22 01:56:18,106 INFO L226 Difference]: Without dead ends: 2822 [2021-05-22 01:56:18,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2021-05-22 01:56:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 1390. [2021-05-22 01:56:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.9640028797696183) internal successors, (5506), 1389 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 5506 transitions. [2021-05-22 01:56:18,148 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 5506 transitions. Word has length 25 [2021-05-22 01:56:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:18,148 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 5506 transitions. [2021-05-22 01:56:18,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 5506 transitions. [2021-05-22 01:56:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:18,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:18,150 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:18,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2021-05-22 01:56:18,150 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:18,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1759434275, now seen corresponding path program 343 times [2021-05-22 01:56:18,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:18,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983760834] [2021-05-22 01:56:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:18,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:18,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983760834] [2021-05-22 01:56:18,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983760834] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:18,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:18,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:18,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357411606] [2021-05-22 01:56:18,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:18,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:18,224 INFO L87 Difference]: Start difference. First operand 1390 states and 5506 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:18,293 INFO L93 Difference]: Finished difference Result 3096 states and 11479 transitions. [2021-05-22 01:56:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:18,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:18,302 INFO L225 Difference]: With dead ends: 3096 [2021-05-22 01:56:18,303 INFO L226 Difference]: Without dead ends: 2907 [2021-05-22 01:56:18,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2021-05-22 01:56:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 1448. [2021-05-22 01:56:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.9550794747753972) internal successors, (5723), 1447 states have internal predecessors, (5723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5723 transitions. [2021-05-22 01:56:18,344 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5723 transitions. Word has length 25 [2021-05-22 01:56:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:18,344 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 5723 transitions. [2021-05-22 01:56:18,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5723 transitions. [2021-05-22 01:56:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:18,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:18,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:18,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-05-22 01:56:18,346 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1143388475, now seen corresponding path program 344 times [2021-05-22 01:56:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733977115] [2021-05-22 01:56:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:18,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733977115] [2021-05-22 01:56:18,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733977115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:18,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:18,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:18,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957483962] [2021-05-22 01:56:18,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:18,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:18,427 INFO L87 Difference]: Start difference. First operand 1448 states and 5723 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:18,498 INFO L93 Difference]: Finished difference Result 3090 states and 11434 transitions. [2021-05-22 01:56:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:18,503 INFO L225 Difference]: With dead ends: 3090 [2021-05-22 01:56:18,504 INFO L226 Difference]: Without dead ends: 2879 [2021-05-22 01:56:18,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-05-22 01:56:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 1420. [2021-05-22 01:56:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.9612403100775193) internal successors, (5621), 1419 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 5621 transitions. [2021-05-22 01:56:18,537 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 5621 transitions. Word has length 25 [2021-05-22 01:56:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:18,538 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 5621 transitions. [2021-05-22 01:56:18,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 5621 transitions. [2021-05-22 01:56:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:18,539 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:18,539 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:18,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2021-05-22 01:56:18,540 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash 628646365, now seen corresponding path program 345 times [2021-05-22 01:56:18,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:18,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585484762] [2021-05-22 01:56:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:18,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585484762] [2021-05-22 01:56:18,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585484762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:18,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:18,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872476983] [2021-05-22 01:56:18,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:18,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:18,615 INFO L87 Difference]: Start difference. First operand 1420 states and 5621 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:18,678 INFO L93 Difference]: Finished difference Result 3170 states and 11718 transitions. [2021-05-22 01:56:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:18,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:18,684 INFO L225 Difference]: With dead ends: 3170 [2021-05-22 01:56:18,684 INFO L226 Difference]: Without dead ends: 2981 [2021-05-22 01:56:18,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-05-22 01:56:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 1483. [2021-05-22 01:56:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.932523616734143) internal successors, (5828), 1482 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5828 transitions. [2021-05-22 01:56:18,719 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5828 transitions. Word has length 25 [2021-05-22 01:56:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:18,719 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 5828 transitions. [2021-05-22 01:56:18,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5828 transitions. [2021-05-22 01:56:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:18,721 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:18,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:18,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2021-05-22 01:56:18,721 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1360728669, now seen corresponding path program 346 times [2021-05-22 01:56:18,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:18,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051344672] [2021-05-22 01:56:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:18,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051344672] [2021-05-22 01:56:18,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051344672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:18,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:18,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961038683] [2021-05-22 01:56:18,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:18,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:18,806 INFO L87 Difference]: Start difference. First operand 1483 states and 5828 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:18,856 INFO L93 Difference]: Finished difference Result 3203 states and 11801 transitions. [2021-05-22 01:56:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:18,861 INFO L225 Difference]: With dead ends: 3203 [2021-05-22 01:56:18,862 INFO L226 Difference]: Without dead ends: 2918 [2021-05-22 01:56:18,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2021-05-22 01:56:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 1420. [2021-05-22 01:56:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.9400986610288937) internal successors, (5591), 1419 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 5591 transitions. [2021-05-22 01:56:18,895 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 5591 transitions. Word has length 25 [2021-05-22 01:56:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:18,895 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 5591 transitions. [2021-05-22 01:56:18,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 5591 transitions. [2021-05-22 01:56:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:18,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:18,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:18,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2021-05-22 01:56:18,897 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash 992903739, now seen corresponding path program 347 times [2021-05-22 01:56:18,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:18,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875970176] [2021-05-22 01:56:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:18,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:18,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875970176] [2021-05-22 01:56:18,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875970176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:18,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:18,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:18,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930878619] [2021-05-22 01:56:18,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:18,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:18,981 INFO L87 Difference]: Start difference. First operand 1420 states and 5591 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:19,038 INFO L93 Difference]: Finished difference Result 3139 states and 11596 transitions. [2021-05-22 01:56:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:19,044 INFO L225 Difference]: With dead ends: 3139 [2021-05-22 01:56:19,044 INFO L226 Difference]: Without dead ends: 2956 [2021-05-22 01:56:19,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-05-22 01:56:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 1464. [2021-05-22 01:56:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.9254955570745045) internal successors, (5743), 1463 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5743 transitions. [2021-05-22 01:56:19,078 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5743 transitions. Word has length 25 [2021-05-22 01:56:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:19,078 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 5743 transitions. [2021-05-22 01:56:19,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5743 transitions. [2021-05-22 01:56:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:19,080 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:19,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:19,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2021-05-22 01:56:19,080 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash -76615267, now seen corresponding path program 348 times [2021-05-22 01:56:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:19,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857250759] [2021-05-22 01:56:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:19,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:19,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857250759] [2021-05-22 01:56:19,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857250759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:19,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:19,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:19,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292162456] [2021-05-22 01:56:19,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:19,164 INFO L87 Difference]: Start difference. First operand 1464 states and 5743 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:19,211 INFO L93 Difference]: Finished difference Result 3178 states and 11699 transitions. [2021-05-22 01:56:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:19,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:19,216 INFO L225 Difference]: With dead ends: 3178 [2021-05-22 01:56:19,216 INFO L226 Difference]: Without dead ends: 2882 [2021-05-22 01:56:19,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-05-22 01:56:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1390. [2021-05-22 01:56:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.9539236861051115) internal successors, (5492), 1389 states have internal predecessors, (5492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 5492 transitions. [2021-05-22 01:56:19,265 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 5492 transitions. Word has length 25 [2021-05-22 01:56:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:19,265 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 5492 transitions. [2021-05-22 01:56:19,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 5492 transitions. [2021-05-22 01:56:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:19,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:19,266 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:19,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-05-22 01:56:19,267 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1678784955, now seen corresponding path program 349 times [2021-05-22 01:56:19,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:19,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464510622] [2021-05-22 01:56:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:19,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:19,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464510622] [2021-05-22 01:56:19,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464510622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:19,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:19,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:19,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826490136] [2021-05-22 01:56:19,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:19,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:19,357 INFO L87 Difference]: Start difference. First operand 1390 states and 5492 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:19,415 INFO L93 Difference]: Finished difference Result 3038 states and 11232 transitions. [2021-05-22 01:56:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:19,420 INFO L225 Difference]: With dead ends: 3038 [2021-05-22 01:56:19,420 INFO L226 Difference]: Without dead ends: 2849 [2021-05-22 01:56:19,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-05-22 01:56:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 1442. [2021-05-22 01:56:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.947258848022207) internal successors, (5688), 1441 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5688 transitions. [2021-05-22 01:56:19,454 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5688 transitions. Word has length 25 [2021-05-22 01:56:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 5688 transitions. [2021-05-22 01:56:19,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5688 transitions. [2021-05-22 01:56:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:19,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:19,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:19,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2021-05-22 01:56:19,456 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash -772523461, now seen corresponding path program 350 times [2021-05-22 01:56:19,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:19,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371934815] [2021-05-22 01:56:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:19,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371934815] [2021-05-22 01:56:19,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371934815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:19,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:19,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:19,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273986284] [2021-05-22 01:56:19,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:19,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:19,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:19,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:19,550 INFO L87 Difference]: Start difference. First operand 1442 states and 5688 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:19,612 INFO L93 Difference]: Finished difference Result 3024 states and 11163 transitions. [2021-05-22 01:56:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:19,617 INFO L225 Difference]: With dead ends: 3024 [2021-05-22 01:56:19,617 INFO L226 Difference]: Without dead ends: 2825 [2021-05-22 01:56:19,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-05-22 01:56:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1418. [2021-05-22 01:56:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.952011291460833) internal successors, (5600), 1417 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5600 transitions. [2021-05-22 01:56:19,650 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5600 transitions. Word has length 25 [2021-05-22 01:56:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:19,650 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 5600 transitions. [2021-05-22 01:56:19,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5600 transitions. [2021-05-22 01:56:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:19,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:19,652 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:19,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2021-05-22 01:56:19,652 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1061261597, now seen corresponding path program 351 times [2021-05-22 01:56:19,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:19,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690322447] [2021-05-22 01:56:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:19,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:19,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690322447] [2021-05-22 01:56:19,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690322447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:19,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:19,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720615607] [2021-05-22 01:56:19,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:19,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:19,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:19,734 INFO L87 Difference]: Start difference. First operand 1418 states and 5600 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:19,792 INFO L93 Difference]: Finished difference Result 3061 states and 11279 transitions. [2021-05-22 01:56:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:19,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:19,797 INFO L225 Difference]: With dead ends: 3061 [2021-05-22 01:56:19,797 INFO L226 Difference]: Without dead ends: 2872 [2021-05-22 01:56:19,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-05-22 01:56:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 1481. [2021-05-22 01:56:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.9236486486486486) internal successors, (5807), 1480 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5807 transitions. [2021-05-22 01:56:19,832 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5807 transitions. Word has length 25 [2021-05-22 01:56:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:19,832 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5807 transitions. [2021-05-22 01:56:19,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5807 transitions. [2021-05-22 01:56:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:19,834 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:19,834 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:19,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2021-05-22 01:56:19,834 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash -662332869, now seen corresponding path program 352 times [2021-05-22 01:56:19,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:19,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826385007] [2021-05-22 01:56:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:19,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:19,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826385007] [2021-05-22 01:56:19,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826385007] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:19,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:19,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601450176] [2021-05-22 01:56:19,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:19,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:19,917 INFO L87 Difference]: Start difference. First operand 1481 states and 5807 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:19,964 INFO L93 Difference]: Finished difference Result 3094 states and 11362 transitions. [2021-05-22 01:56:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:19,970 INFO L225 Difference]: With dead ends: 3094 [2021-05-22 01:56:19,970 INFO L226 Difference]: Without dead ends: 2809 [2021-05-22 01:56:19,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-05-22 01:56:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1418. [2021-05-22 01:56:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.9322512350035286) internal successors, (5572), 1417 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5572 transitions. [2021-05-22 01:56:20,003 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5572 transitions. Word has length 25 [2021-05-22 01:56:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:20,003 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 5572 transitions. [2021-05-22 01:56:20,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5572 transitions. [2021-05-22 01:56:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:20,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:20,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:20,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2021-05-22 01:56:20,005 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1616065861, now seen corresponding path program 353 times [2021-05-22 01:56:20,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:20,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772947338] [2021-05-22 01:56:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:20,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:20,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772947338] [2021-05-22 01:56:20,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772947338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:20,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:20,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:20,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135319196] [2021-05-22 01:56:20,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:20,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:20,094 INFO L87 Difference]: Start difference. First operand 1418 states and 5572 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:20,153 INFO L93 Difference]: Finished difference Result 3010 states and 11087 transitions. [2021-05-22 01:56:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:20,158 INFO L225 Difference]: With dead ends: 3010 [2021-05-22 01:56:20,158 INFO L226 Difference]: Without dead ends: 2835 [2021-05-22 01:56:20,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-05-22 01:56:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1458. [2021-05-22 01:56:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.9203843514070007) internal successors, (5712), 1457 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5712 transitions. [2021-05-22 01:56:20,192 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5712 transitions. Word has length 25 [2021-05-22 01:56:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:20,192 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5712 transitions. [2021-05-22 01:56:20,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5712 transitions. [2021-05-22 01:56:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:20,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:20,194 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:20,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2021-05-22 01:56:20,194 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1397714275, now seen corresponding path program 354 times [2021-05-22 01:56:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:20,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777679970] [2021-05-22 01:56:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:20,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:20,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777679970] [2021-05-22 01:56:20,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777679970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:20,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:20,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644494231] [2021-05-22 01:56:20,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:20,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:20,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:20,284 INFO L87 Difference]: Start difference. First operand 1458 states and 5712 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:20,331 INFO L93 Difference]: Finished difference Result 2962 states and 10887 transitions. [2021-05-22 01:56:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:20,337 INFO L225 Difference]: With dead ends: 2962 [2021-05-22 01:56:20,337 INFO L226 Difference]: Without dead ends: 2672 [2021-05-22 01:56:20,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-22 01:56:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1390. [2021-05-22 01:56:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.9438444924406046) internal successors, (5478), 1389 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 5478 transitions. [2021-05-22 01:56:20,369 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 5478 transitions. Word has length 25 [2021-05-22 01:56:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:20,369 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 5478 transitions. [2021-05-22 01:56:20,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 5478 transitions. [2021-05-22 01:56:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:20,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:20,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:20,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2021-05-22 01:56:20,371 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2023140121, now seen corresponding path program 355 times [2021-05-22 01:56:20,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:20,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359608287] [2021-05-22 01:56:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:20,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:20,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359608287] [2021-05-22 01:56:20,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359608287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:20,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:20,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:20,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49864796] [2021-05-22 01:56:20,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:20,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:20,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:20,458 INFO L87 Difference]: Start difference. First operand 1390 states and 5478 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:20,517 INFO L93 Difference]: Finished difference Result 2993 states and 11081 transitions. [2021-05-22 01:56:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:20,522 INFO L225 Difference]: With dead ends: 2993 [2021-05-22 01:56:20,522 INFO L226 Difference]: Without dead ends: 2810 [2021-05-22 01:56:20,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-05-22 01:56:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1434. [2021-05-22 01:56:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.939986043265876) internal successors, (5646), 1433 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 5646 transitions. [2021-05-22 01:56:20,557 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 5646 transitions. Word has length 25 [2021-05-22 01:56:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:20,557 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 5646 transitions. [2021-05-22 01:56:20,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 5646 transitions. [2021-05-22 01:56:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:20,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:20,559 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:20,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2021-05-22 01:56:20,559 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1190764549, now seen corresponding path program 356 times [2021-05-22 01:56:20,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:20,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210244620] [2021-05-22 01:56:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:20,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210244620] [2021-05-22 01:56:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210244620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:20,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:20,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:20,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336179353] [2021-05-22 01:56:20,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:20,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:20,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:20,641 INFO L87 Difference]: Start difference. First operand 1434 states and 5646 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:20,707 INFO L93 Difference]: Finished difference Result 2985 states and 11029 transitions. [2021-05-22 01:56:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:20,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:20,713 INFO L225 Difference]: With dead ends: 2985 [2021-05-22 01:56:20,713 INFO L226 Difference]: Without dead ends: 2786 [2021-05-22 01:56:20,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-05-22 01:56:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1410. [2021-05-22 01:56:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.944641589779986) internal successors, (5558), 1409 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 5558 transitions. [2021-05-22 01:56:20,746 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 5558 transitions. Word has length 25 [2021-05-22 01:56:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:20,746 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 5558 transitions. [2021-05-22 01:56:20,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 5558 transitions. [2021-05-22 01:56:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:20,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:20,748 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:20,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2021-05-22 01:56:20,748 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:20,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1405616763, now seen corresponding path program 357 times [2021-05-22 01:56:20,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:20,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049805880] [2021-05-22 01:56:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:20,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:20,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049805880] [2021-05-22 01:56:20,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049805880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:20,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:20,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549729923] [2021-05-22 01:56:20,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:20,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:20,837 INFO L87 Difference]: Start difference. First operand 1410 states and 5558 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:20,904 INFO L93 Difference]: Finished difference Result 2921 states and 10793 transitions. [2021-05-22 01:56:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:20,910 INFO L225 Difference]: With dead ends: 2921 [2021-05-22 01:56:20,910 INFO L226 Difference]: Without dead ends: 2738 [2021-05-22 01:56:20,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-05-22 01:56:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 1454. [2021-05-22 01:56:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.9298004129387474) internal successors, (5710), 1453 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5710 transitions. [2021-05-22 01:56:20,943 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5710 transitions. Word has length 25 [2021-05-22 01:56:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:20,943 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 5710 transitions. [2021-05-22 01:56:20,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5710 transitions. [2021-05-22 01:56:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:20,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:20,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:20,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2021-05-22 01:56:20,945 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2119579013, now seen corresponding path program 358 times [2021-05-22 01:56:20,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:20,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664721865] [2021-05-22 01:56:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:21,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:21,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664721865] [2021-05-22 01:56:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664721865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:21,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:21,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:21,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118917294] [2021-05-22 01:56:21,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:21,050 INFO L87 Difference]: Start difference. First operand 1454 states and 5710 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:21,114 INFO L93 Difference]: Finished difference Result 2960 states and 10896 transitions. [2021-05-22 01:56:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:21,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:21,120 INFO L225 Difference]: With dead ends: 2960 [2021-05-22 01:56:21,120 INFO L226 Difference]: Without dead ends: 2694 [2021-05-22 01:56:21,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2021-05-22 01:56:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 1410. [2021-05-22 01:56:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.930447125621008) internal successors, (5538), 1409 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 5538 transitions. [2021-05-22 01:56:21,153 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 5538 transitions. Word has length 25 [2021-05-22 01:56:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:21,154 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 5538 transitions. [2021-05-22 01:56:21,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 5538 transitions. [2021-05-22 01:56:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:21,155 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:21,155 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:21,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2021-05-22 01:56:21,156 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1793621725, now seen corresponding path program 359 times [2021-05-22 01:56:21,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:21,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589654902] [2021-05-22 01:56:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:21,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589654902] [2021-05-22 01:56:21,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589654902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:21,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:21,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:21,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189211309] [2021-05-22 01:56:21,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:21,244 INFO L87 Difference]: Start difference. First operand 1410 states and 5538 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:21,304 INFO L93 Difference]: Finished difference Result 2861 states and 10537 transitions. [2021-05-22 01:56:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:21,309 INFO L225 Difference]: With dead ends: 2861 [2021-05-22 01:56:21,309 INFO L226 Difference]: Without dead ends: 2686 [2021-05-22 01:56:21,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-05-22 01:56:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1450. [2021-05-22 01:56:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.9185645272601795) internal successors, (5678), 1449 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 5678 transitions. [2021-05-22 01:56:21,355 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 5678 transitions. Word has length 25 [2021-05-22 01:56:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:21,355 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 5678 transitions. [2021-05-22 01:56:21,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 5678 transitions. [2021-05-22 01:56:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:21,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:21,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:21,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2021-05-22 01:56:21,357 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -27413701, now seen corresponding path program 360 times [2021-05-22 01:56:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:21,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287969293] [2021-05-22 01:56:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:21,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:21,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287969293] [2021-05-22 01:56:21,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287969293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:21,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:21,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:21,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138795445] [2021-05-22 01:56:21,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:21,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:21,445 INFO L87 Difference]: Start difference. First operand 1450 states and 5678 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:21,494 INFO L93 Difference]: Finished difference Result 2813 states and 10337 transitions. [2021-05-22 01:56:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:21,499 INFO L225 Difference]: With dead ends: 2813 [2021-05-22 01:56:21,499 INFO L226 Difference]: Without dead ends: 2511 [2021-05-22 01:56:21,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-05-22 01:56:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1370. [2021-05-22 01:56:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.9656683710737766) internal successors, (5429), 1369 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5429 transitions. [2021-05-22 01:56:21,530 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5429 transitions. Word has length 25 [2021-05-22 01:56:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:21,530 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5429 transitions. [2021-05-22 01:56:21,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5429 transitions. [2021-05-22 01:56:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:21,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:21,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:21,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2021-05-22 01:56:21,532 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash 953609979, now seen corresponding path program 361 times [2021-05-22 01:56:21,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:21,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805917352] [2021-05-22 01:56:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:21,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:21,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805917352] [2021-05-22 01:56:21,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805917352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:21,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:21,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996446935] [2021-05-22 01:56:21,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:21,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:21,620 INFO L87 Difference]: Start difference. First operand 1370 states and 5429 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:21,670 INFO L93 Difference]: Finished difference Result 2920 states and 10769 transitions. [2021-05-22 01:56:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:21,675 INFO L225 Difference]: With dead ends: 2920 [2021-05-22 01:56:21,675 INFO L226 Difference]: Without dead ends: 2761 [2021-05-22 01:56:21,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-05-22 01:56:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 1418. [2021-05-22 01:56:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.961185603387438) internal successors, (5613), 1417 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5613 transitions. [2021-05-22 01:56:21,709 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5613 transitions. Word has length 25 [2021-05-22 01:56:21,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:21,709 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 5613 transitions. [2021-05-22 01:56:21,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5613 transitions. [2021-05-22 01:56:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:21,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:21,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:21,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2021-05-22 01:56:21,711 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash -54688005, now seen corresponding path program 362 times [2021-05-22 01:56:21,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:21,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055534285] [2021-05-22 01:56:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:21,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:21,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055534285] [2021-05-22 01:56:21,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055534285] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:21,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:21,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:21,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452772772] [2021-05-22 01:56:21,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:21,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:21,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:21,799 INFO L87 Difference]: Start difference. First operand 1418 states and 5613 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:21,849 INFO L93 Difference]: Finished difference Result 2983 states and 10976 transitions. [2021-05-22 01:56:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:21,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:21,854 INFO L225 Difference]: With dead ends: 2983 [2021-05-22 01:56:21,854 INFO L226 Difference]: Without dead ends: 2729 [2021-05-22 01:56:21,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-05-22 01:56:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1386. [2021-05-22 01:56:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.96028880866426) internal successors, (5485), 1385 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 5485 transitions. [2021-05-22 01:56:21,887 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 5485 transitions. Word has length 25 [2021-05-22 01:56:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:21,887 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 5485 transitions. [2021-05-22 01:56:21,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 5485 transitions. [2021-05-22 01:56:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:21,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:21,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:21,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2021-05-22 01:56:21,889 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1942643485, now seen corresponding path program 363 times [2021-05-22 01:56:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:21,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048302541] [2021-05-22 01:56:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:21,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:21,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048302541] [2021-05-22 01:56:21,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048302541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:21,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:21,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:21,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926100207] [2021-05-22 01:56:21,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:21,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:21,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:21,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:21,982 INFO L87 Difference]: Start difference. First operand 1386 states and 5485 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:22,032 INFO L93 Difference]: Finished difference Result 2869 states and 10570 transitions. [2021-05-22 01:56:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:22,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:22,037 INFO L225 Difference]: With dead ends: 2869 [2021-05-22 01:56:22,037 INFO L226 Difference]: Without dead ends: 2710 [2021-05-22 01:56:22,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-05-22 01:56:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1402. [2021-05-22 01:56:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.9493219129193435) internal successors, (5533), 1401 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 5533 transitions. [2021-05-22 01:56:22,070 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 5533 transitions. Word has length 25 [2021-05-22 01:56:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:22,070 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 5533 transitions. [2021-05-22 01:56:22,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 5533 transitions. [2021-05-22 01:56:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:22,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:22,072 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:22,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2021-05-22 01:56:22,072 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1344025827, now seen corresponding path program 364 times [2021-05-22 01:56:22,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:22,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201481716] [2021-05-22 01:56:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201481716] [2021-05-22 01:56:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201481716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:22,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:22,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60984626] [2021-05-22 01:56:22,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:22,171 INFO L87 Difference]: Start difference. First operand 1402 states and 5533 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:22,253 INFO L93 Difference]: Finished difference Result 2897 states and 10658 transitions. [2021-05-22 01:56:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:22,258 INFO L225 Difference]: With dead ends: 2897 [2021-05-22 01:56:22,258 INFO L226 Difference]: Without dead ends: 2694 [2021-05-22 01:56:22,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2021-05-22 01:56:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 1386. [2021-05-22 01:56:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.954512635379061) internal successors, (5477), 1385 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 5477 transitions. [2021-05-22 01:56:22,294 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 5477 transitions. Word has length 25 [2021-05-22 01:56:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 5477 transitions. [2021-05-22 01:56:22,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 5477 transitions. [2021-05-22 01:56:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:22,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:22,296 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:22,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2021-05-22 01:56:22,296 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 344220445, now seen corresponding path program 365 times [2021-05-22 01:56:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:22,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982636970] [2021-05-22 01:56:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:22,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:22,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982636970] [2021-05-22 01:56:22,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982636970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:22,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:22,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:22,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105363087] [2021-05-22 01:56:22,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:22,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:22,379 INFO L87 Difference]: Start difference. First operand 1386 states and 5477 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:22,450 INFO L93 Difference]: Finished difference Result 2990 states and 11012 transitions. [2021-05-22 01:56:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:22,455 INFO L225 Difference]: With dead ends: 2990 [2021-05-22 01:56:22,455 INFO L226 Difference]: Without dead ends: 2803 [2021-05-22 01:56:22,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-05-22 01:56:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1432. [2021-05-22 01:56:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.9371069182389937) internal successors, (5634), 1431 states have internal predecessors, (5634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 5634 transitions. [2021-05-22 01:56:22,490 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 5634 transitions. Word has length 25 [2021-05-22 01:56:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:22,490 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 5634 transitions. [2021-05-22 01:56:22,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 5634 transitions. [2021-05-22 01:56:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:22,492 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:22,492 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:22,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2021-05-22 01:56:22,492 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash -8919045, now seen corresponding path program 366 times [2021-05-22 01:56:22,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:22,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371009079] [2021-05-22 01:56:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:22,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:22,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371009079] [2021-05-22 01:56:22,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371009079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:22,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:22,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:22,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073114483] [2021-05-22 01:56:22,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:22,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:22,575 INFO L87 Difference]: Start difference. First operand 1432 states and 5634 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:22,626 INFO L93 Difference]: Finished difference Result 3025 states and 11101 transitions. [2021-05-22 01:56:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:22,632 INFO L225 Difference]: With dead ends: 3025 [2021-05-22 01:56:22,632 INFO L226 Difference]: Without dead ends: 2741 [2021-05-22 01:56:22,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-05-22 01:56:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 1370. [2021-05-22 01:56:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.959824689554419) internal successors, (5421), 1369 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5421 transitions. [2021-05-22 01:56:22,665 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5421 transitions. Word has length 25 [2021-05-22 01:56:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:22,665 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5421 transitions. [2021-05-22 01:56:22,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5421 transitions. [2021-05-22 01:56:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:22,667 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:22,667 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:22,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2021-05-22 01:56:22,667 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1631755555, now seen corresponding path program 367 times [2021-05-22 01:56:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:22,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205710864] [2021-05-22 01:56:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:22,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:22,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205710864] [2021-05-22 01:56:22,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205710864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:22,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:22,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:22,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557473730] [2021-05-22 01:56:22,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:22,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:22,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:22,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:22,761 INFO L87 Difference]: Start difference. First operand 1370 states and 5421 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:22,811 INFO L93 Difference]: Finished difference Result 2914 states and 10742 transitions. [2021-05-22 01:56:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:22,816 INFO L225 Difference]: With dead ends: 2914 [2021-05-22 01:56:22,816 INFO L226 Difference]: Without dead ends: 2755 [2021-05-22 01:56:22,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-05-22 01:56:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1418. [2021-05-22 01:56:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.9555398729710656) internal successors, (5605), 1417 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5605 transitions. [2021-05-22 01:56:22,851 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5605 transitions. Word has length 25 [2021-05-22 01:56:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:22,851 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 5605 transitions. [2021-05-22 01:56:22,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5605 transitions. [2021-05-22 01:56:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:22,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:22,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:22,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371 [2021-05-22 01:56:22,853 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1654913757, now seen corresponding path program 368 times [2021-05-22 01:56:22,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:22,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129837187] [2021-05-22 01:56:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:22,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:22,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129837187] [2021-05-22 01:56:22,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129837187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:22,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:22,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:22,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160537920] [2021-05-22 01:56:22,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:22,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:22,942 INFO L87 Difference]: Start difference. First operand 1418 states and 5605 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:22,993 INFO L93 Difference]: Finished difference Result 2977 states and 10949 transitions. [2021-05-22 01:56:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:22,999 INFO L225 Difference]: With dead ends: 2977 [2021-05-22 01:56:22,999 INFO L226 Difference]: Without dead ends: 2723 [2021-05-22 01:56:22,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-05-22 01:56:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1386. [2021-05-22 01:56:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.954512635379061) internal successors, (5477), 1385 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 5477 transitions. [2021-05-22 01:56:23,037 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 5477 transitions. Word has length 25 [2021-05-22 01:56:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:23,037 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 5477 transitions. [2021-05-22 01:56:23,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 5477 transitions. [2021-05-22 01:56:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:23,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:23,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:23,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2021-05-22 01:56:23,039 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1626002787, now seen corresponding path program 369 times [2021-05-22 01:56:23,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:23,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659030438] [2021-05-22 01:56:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:23,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:23,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659030438] [2021-05-22 01:56:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659030438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:23,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:23,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:23,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34309495] [2021-05-22 01:56:23,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:23,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:23,140 INFO L87 Difference]: Start difference. First operand 1386 states and 5477 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:23,201 INFO L93 Difference]: Finished difference Result 2859 states and 10531 transitions. [2021-05-22 01:56:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:23,208 INFO L225 Difference]: With dead ends: 2859 [2021-05-22 01:56:23,208 INFO L226 Difference]: Without dead ends: 2700 [2021-05-22 01:56:23,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-05-22 01:56:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1402. [2021-05-22 01:56:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.9436117059243396) internal successors, (5525), 1401 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 5525 transitions. [2021-05-22 01:56:23,255 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 5525 transitions. Word has length 25 [2021-05-22 01:56:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:23,255 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 5525 transitions. [2021-05-22 01:56:23,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 5525 transitions. [2021-05-22 01:56:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:23,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:23,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:23,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2021-05-22 01:56:23,258 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:23,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:23,259 INFO L82 PathProgramCache]: Analyzing trace with hash 54493853, now seen corresponding path program 370 times [2021-05-22 01:56:23,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:23,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977802818] [2021-05-22 01:56:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:23,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:23,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977802818] [2021-05-22 01:56:23,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977802818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:23,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:23,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:23,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690486424] [2021-05-22 01:56:23,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:23,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:23,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:23,356 INFO L87 Difference]: Start difference. First operand 1402 states and 5525 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:23,430 INFO L93 Difference]: Finished difference Result 2883 states and 10607 transitions. [2021-05-22 01:56:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:23,435 INFO L225 Difference]: With dead ends: 2883 [2021-05-22 01:56:23,435 INFO L226 Difference]: Without dead ends: 2684 [2021-05-22 01:56:23,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-05-22 01:56:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1386. [2021-05-22 01:56:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.948736462093863) internal successors, (5469), 1385 states have internal predecessors, (5469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 5469 transitions. [2021-05-22 01:56:23,469 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 5469 transitions. Word has length 25 [2021-05-22 01:56:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:23,469 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 5469 transitions. [2021-05-22 01:56:23,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 5469 transitions. [2021-05-22 01:56:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:23,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:23,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:23,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374 [2021-05-22 01:56:23,471 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1742740125, now seen corresponding path program 371 times [2021-05-22 01:56:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:23,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935444060] [2021-05-22 01:56:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935444060] [2021-05-22 01:56:23,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935444060] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:23,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:23,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:23,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309860237] [2021-05-22 01:56:23,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:23,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:23,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:23,576 INFO L87 Difference]: Start difference. First operand 1386 states and 5469 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:23,640 INFO L93 Difference]: Finished difference Result 2974 states and 10954 transitions. [2021-05-22 01:56:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:23,645 INFO L225 Difference]: With dead ends: 2974 [2021-05-22 01:56:23,645 INFO L226 Difference]: Without dead ends: 2791 [2021-05-22 01:56:23,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-05-22 01:56:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1430. [2021-05-22 01:56:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.933519944016795) internal successors, (5621), 1429 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 5621 transitions. [2021-05-22 01:56:23,679 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 5621 transitions. Word has length 25 [2021-05-22 01:56:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:23,680 INFO L482 AbstractCegarLoop]: Abstraction has 1430 states and 5621 transitions. [2021-05-22 01:56:23,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 5621 transitions. [2021-05-22 01:56:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:23,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:23,681 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:23,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375 [2021-05-22 01:56:23,682 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash 738408187, now seen corresponding path program 372 times [2021-05-22 01:56:23,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:23,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871626386] [2021-05-22 01:56:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:23,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871626386] [2021-05-22 01:56:23,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871626386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:23,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:23,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:23,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458569256] [2021-05-22 01:56:23,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:23,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:23,775 INFO L87 Difference]: Start difference. First operand 1430 states and 5621 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:23,824 INFO L93 Difference]: Finished difference Result 3013 states and 11057 transitions. [2021-05-22 01:56:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:23,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:23,829 INFO L225 Difference]: With dead ends: 3013 [2021-05-22 01:56:23,830 INFO L226 Difference]: Without dead ends: 2731 [2021-05-22 01:56:23,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-05-22 01:56:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1370. [2021-05-22 01:56:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.953981008035062) internal successors, (5413), 1369 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5413 transitions. [2021-05-22 01:56:23,863 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5413 transitions. Word has length 25 [2021-05-22 01:56:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:23,863 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5413 transitions. [2021-05-22 01:56:23,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5413 transitions. [2021-05-22 01:56:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:23,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:23,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:23,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376 [2021-05-22 01:56:23,865 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2090389953, now seen corresponding path program 373 times [2021-05-22 01:56:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:23,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287782617] [2021-05-22 01:56:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:23,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:23,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287782617] [2021-05-22 01:56:23,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287782617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:23,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:23,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:23,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863587930] [2021-05-22 01:56:23,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:23,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:23,949 INFO L87 Difference]: Start difference. First operand 1370 states and 5413 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:23,999 INFO L93 Difference]: Finished difference Result 2788 states and 10268 transitions. [2021-05-22 01:56:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:24,006 INFO L225 Difference]: With dead ends: 2788 [2021-05-22 01:56:24,006 INFO L226 Difference]: Without dead ends: 2629 [2021-05-22 01:56:24,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-05-22 01:56:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1394. [2021-05-22 01:56:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.946159368269921) internal successors, (5497), 1393 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5497 transitions. [2021-05-22 01:56:24,039 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5497 transitions. Word has length 25 [2021-05-22 01:56:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:24,039 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5497 transitions. [2021-05-22 01:56:24,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5497 transitions. [2021-05-22 01:56:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:24,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:24,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:24,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377 [2021-05-22 01:56:24,041 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1082091969, now seen corresponding path program 374 times [2021-05-22 01:56:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106959978] [2021-05-22 01:56:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:24,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:24,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106959978] [2021-05-22 01:56:24,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106959978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:24,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:24,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621939054] [2021-05-22 01:56:24,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:24,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:24,125 INFO L87 Difference]: Start difference. First operand 1394 states and 5497 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:24,189 INFO L93 Difference]: Finished difference Result 2816 states and 10356 transitions. [2021-05-22 01:56:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:24,194 INFO L225 Difference]: With dead ends: 2816 [2021-05-22 01:56:24,194 INFO L226 Difference]: Without dead ends: 2613 [2021-05-22 01:56:24,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-05-22 01:56:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1378. [2021-05-22 01:56:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.9513435003631083) internal successors, (5441), 1377 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5441 transitions. [2021-05-22 01:56:24,226 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5441 transitions. Word has length 25 [2021-05-22 01:56:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:24,226 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 5441 transitions. [2021-05-22 01:56:24,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5441 transitions. [2021-05-22 01:56:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:24,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:24,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:24,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378 [2021-05-22 01:56:24,228 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1357780381, now seen corresponding path program 375 times [2021-05-22 01:56:24,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:24,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187851483] [2021-05-22 01:56:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:24,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:24,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187851483] [2021-05-22 01:56:24,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187851483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:24,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:24,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:24,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592457303] [2021-05-22 01:56:24,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:24,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:24,303 INFO L87 Difference]: Start difference. First operand 1378 states and 5441 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:24,352 INFO L93 Difference]: Finished difference Result 2784 states and 10248 transitions. [2021-05-22 01:56:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:24,357 INFO L225 Difference]: With dead ends: 2784 [2021-05-22 01:56:24,357 INFO L226 Difference]: Without dead ends: 2625 [2021-05-22 01:56:24,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-05-22 01:56:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1394. [2021-05-22 01:56:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.940416367552046) internal successors, (5489), 1393 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5489 transitions. [2021-05-22 01:56:24,390 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5489 transitions. Word has length 25 [2021-05-22 01:56:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:24,390 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5489 transitions. [2021-05-22 01:56:24,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5489 transitions. [2021-05-22 01:56:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:24,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:24,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:24,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2021-05-22 01:56:24,392 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1327920703, now seen corresponding path program 376 times [2021-05-22 01:56:24,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:24,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760004009] [2021-05-22 01:56:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:24,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760004009] [2021-05-22 01:56:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760004009] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:24,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:24,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980411510] [2021-05-22 01:56:24,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:24,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:24,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:24,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:24,468 INFO L87 Difference]: Start difference. First operand 1394 states and 5489 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:24,532 INFO L93 Difference]: Finished difference Result 2808 states and 10324 transitions. [2021-05-22 01:56:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:24,537 INFO L225 Difference]: With dead ends: 2808 [2021-05-22 01:56:24,537 INFO L226 Difference]: Without dead ends: 2609 [2021-05-22 01:56:24,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-05-22 01:56:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1378. [2021-05-22 01:56:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.945533769063181) internal successors, (5433), 1377 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5433 transitions. [2021-05-22 01:56:24,569 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5433 transitions. Word has length 25 [2021-05-22 01:56:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:24,569 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 5433 transitions. [2021-05-22 01:56:24,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5433 transitions. [2021-05-22 01:56:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:24,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:24,571 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:24,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380 [2021-05-22 01:56:24,571 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1032524225, now seen corresponding path program 377 times [2021-05-22 01:56:24,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:24,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499585318] [2021-05-22 01:56:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:24,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:24,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499585318] [2021-05-22 01:56:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499585318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:24,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:24,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:24,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986473904] [2021-05-22 01:56:24,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:24,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:24,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:24,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:24,650 INFO L87 Difference]: Start difference. First operand 1378 states and 5433 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:24,712 INFO L93 Difference]: Finished difference Result 2852 states and 10500 transitions. [2021-05-22 01:56:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:24,717 INFO L225 Difference]: With dead ends: 2852 [2021-05-22 01:56:24,717 INFO L226 Difference]: Without dead ends: 2665 [2021-05-22 01:56:24,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-05-22 01:56:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1406. [2021-05-22 01:56:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 3.929537366548043) internal successors, (5521), 1405 states have internal predecessors, (5521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 5521 transitions. [2021-05-22 01:56:24,751 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 5521 transitions. Word has length 25 [2021-05-22 01:56:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:24,751 INFO L482 AbstractCegarLoop]: Abstraction has 1406 states and 5521 transitions. [2021-05-22 01:56:24,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 5521 transitions. [2021-05-22 01:56:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:24,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:24,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:24,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381 [2021-05-22 01:56:24,753 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1219106077, now seen corresponding path program 378 times [2021-05-22 01:56:24,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:24,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104368680] [2021-05-22 01:56:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:24,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:24,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104368680] [2021-05-22 01:56:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104368680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:24,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048384148] [2021-05-22 01:56:24,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:24,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:24,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:24,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:24,830 INFO L87 Difference]: Start difference. First operand 1406 states and 5521 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:24,896 INFO L93 Difference]: Finished difference Result 2848 states and 10460 transitions. [2021-05-22 01:56:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:24,901 INFO L225 Difference]: With dead ends: 2848 [2021-05-22 01:56:24,901 INFO L226 Difference]: Without dead ends: 2629 [2021-05-22 01:56:24,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-05-22 01:56:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1370. [2021-05-22 01:56:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.9510591672753836) internal successors, (5409), 1369 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5409 transitions. [2021-05-22 01:56:24,933 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5409 transitions. Word has length 25 [2021-05-22 01:56:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:24,933 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5409 transitions. [2021-05-22 01:56:24,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5409 transitions. [2021-05-22 01:56:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:24,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:24,936 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:24,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382 [2021-05-22 01:56:24,936 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:24,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2125494721, now seen corresponding path program 379 times [2021-05-22 01:56:24,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:24,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895202366] [2021-05-22 01:56:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:25,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895202366] [2021-05-22 01:56:25,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895202366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:25,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:25,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:25,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348037798] [2021-05-22 01:56:25,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:25,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:25,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:25,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:25,025 INFO L87 Difference]: Start difference. First operand 1370 states and 5409 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:25,094 INFO L93 Difference]: Finished difference Result 2987 states and 11039 transitions. [2021-05-22 01:56:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:25,101 INFO L225 Difference]: With dead ends: 2987 [2021-05-22 01:56:25,101 INFO L226 Difference]: Without dead ends: 2800 [2021-05-22 01:56:25,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-05-22 01:56:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1420. [2021-05-22 01:56:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.9450317124735728) internal successors, (5598), 1419 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 5598 transitions. [2021-05-22 01:56:25,138 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 5598 transitions. Word has length 25 [2021-05-22 01:56:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:25,138 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 5598 transitions. [2021-05-22 01:56:25,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 5598 transitions. [2021-05-22 01:56:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:25,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:25,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:25,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383 [2021-05-22 01:56:25,140 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 126135581, now seen corresponding path program 380 times [2021-05-22 01:56:25,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:25,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505020775] [2021-05-22 01:56:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:25,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505020775] [2021-05-22 01:56:25,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505020775] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:25,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:25,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:25,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21585127] [2021-05-22 01:56:25,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:25,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:25,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:25,226 INFO L87 Difference]: Start difference. First operand 1420 states and 5598 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:25,311 INFO L93 Difference]: Finished difference Result 2983 states and 10999 transitions. [2021-05-22 01:56:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:25,317 INFO L225 Difference]: With dead ends: 2983 [2021-05-22 01:56:25,317 INFO L226 Difference]: Without dead ends: 2772 [2021-05-22 01:56:25,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-05-22 01:56:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 1392. [2021-05-22 01:56:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.9511143062544933) internal successors, (5496), 1391 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5496 transitions. [2021-05-22 01:56:25,350 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5496 transitions. Word has length 25 [2021-05-22 01:56:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:25,351 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 5496 transitions. [2021-05-22 01:56:25,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5496 transitions. [2021-05-22 01:56:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:25,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:25,352 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:25,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2021-05-22 01:56:25,353 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -920845539, now seen corresponding path program 381 times [2021-05-22 01:56:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:25,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325512305] [2021-05-22 01:56:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:25,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:25,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325512305] [2021-05-22 01:56:25,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325512305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:25,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:25,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279760576] [2021-05-22 01:56:25,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:25,428 INFO L87 Difference]: Start difference. First operand 1392 states and 5496 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:25,498 INFO L93 Difference]: Finished difference Result 3044 states and 11227 transitions. [2021-05-22 01:56:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:25,505 INFO L225 Difference]: With dead ends: 3044 [2021-05-22 01:56:25,505 INFO L226 Difference]: Without dead ends: 2857 [2021-05-22 01:56:25,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-05-22 01:56:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 1438. [2021-05-22 01:56:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.9338900487125956) internal successors, (5653), 1437 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 5653 transitions. [2021-05-22 01:56:25,539 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 5653 transitions. Word has length 25 [2021-05-22 01:56:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:25,539 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 5653 transitions. [2021-05-22 01:56:25,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 5653 transitions. [2021-05-22 01:56:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:25,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:25,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:25,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385 [2021-05-22 01:56:25,541 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:25,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:25,542 INFO L82 PathProgramCache]: Analyzing trace with hash -839955683, now seen corresponding path program 382 times [2021-05-22 01:56:25,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:25,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415771348] [2021-05-22 01:56:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:25,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:25,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415771348] [2021-05-22 01:56:25,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415771348] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:25,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:25,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:25,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66937714] [2021-05-22 01:56:25,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:25,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:25,617 INFO L87 Difference]: Start difference. First operand 1438 states and 5653 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:25,678 INFO L93 Difference]: Finished difference Result 3079 states and 11316 transitions. [2021-05-22 01:56:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:25,684 INFO L225 Difference]: With dead ends: 3079 [2021-05-22 01:56:25,684 INFO L226 Difference]: Without dead ends: 2811 [2021-05-22 01:56:25,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-05-22 01:56:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1392. [2021-05-22 01:56:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.9352983465133) internal successors, (5474), 1391 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5474 transitions. [2021-05-22 01:56:25,717 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5474 transitions. Word has length 25 [2021-05-22 01:56:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:25,717 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 5474 transitions. [2021-05-22 01:56:25,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5474 transitions. [2021-05-22 01:56:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:25,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:25,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:25,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386 [2021-05-22 01:56:25,719 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash 61502075, now seen corresponding path program 383 times [2021-05-22 01:56:25,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:25,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296286088] [2021-05-22 01:56:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:25,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:25,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296286088] [2021-05-22 01:56:25,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296286088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:25,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:25,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:25,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928595767] [2021-05-22 01:56:25,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:25,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:25,805 INFO L87 Difference]: Start difference. First operand 1392 states and 5474 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:25,868 INFO L93 Difference]: Finished difference Result 3034 states and 11174 transitions. [2021-05-22 01:56:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:25,874 INFO L225 Difference]: With dead ends: 3034 [2021-05-22 01:56:25,874 INFO L226 Difference]: Without dead ends: 2851 [2021-05-22 01:56:25,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-05-22 01:56:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 1436. [2021-05-22 01:56:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.9205574912891987) internal successors, (5626), 1435 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5626 transitions. [2021-05-22 01:56:25,909 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5626 transitions. Word has length 25 [2021-05-22 01:56:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:25,909 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 5626 transitions. [2021-05-22 01:56:25,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5626 transitions. [2021-05-22 01:56:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:25,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:25,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:25,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387 [2021-05-22 01:56:25,911 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1008016931, now seen corresponding path program 384 times [2021-05-22 01:56:25,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:25,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222756286] [2021-05-22 01:56:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:26,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222756286] [2021-05-22 01:56:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222756286] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:26,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:26,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:26,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561120037] [2021-05-22 01:56:26,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:26,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:26,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:26,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:26,020 INFO L87 Difference]: Start difference. First operand 1436 states and 5626 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:26,091 INFO L93 Difference]: Finished difference Result 3073 states and 11277 transitions. [2021-05-22 01:56:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:26,096 INFO L225 Difference]: With dead ends: 3073 [2021-05-22 01:56:26,096 INFO L226 Difference]: Without dead ends: 2777 [2021-05-22 01:56:26,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-05-22 01:56:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1362. [2021-05-22 01:56:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.9566495224099927) internal successors, (5385), 1361 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 5385 transitions. [2021-05-22 01:56:26,129 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 5385 transitions. Word has length 25 [2021-05-22 01:56:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:26,129 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 5385 transitions. [2021-05-22 01:56:26,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 5385 transitions. [2021-05-22 01:56:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:26,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:26,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:26,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388 [2021-05-22 01:56:26,131 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1091571107, now seen corresponding path program 385 times [2021-05-22 01:56:26,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:26,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991712785] [2021-05-22 01:56:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:26,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:26,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991712785] [2021-05-22 01:56:26,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991712785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:26,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:26,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700880530] [2021-05-22 01:56:26,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:26,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:26,218 INFO L87 Difference]: Start difference. First operand 1362 states and 5385 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:26,270 INFO L93 Difference]: Finished difference Result 2878 states and 10584 transitions. [2021-05-22 01:56:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:26,276 INFO L225 Difference]: With dead ends: 2878 [2021-05-22 01:56:26,276 INFO L226 Difference]: Without dead ends: 2719 [2021-05-22 01:56:26,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-05-22 01:56:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1394. [2021-05-22 01:56:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.946159368269921) internal successors, (5497), 1393 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5497 transitions. [2021-05-22 01:56:26,309 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5497 transitions. Word has length 25 [2021-05-22 01:56:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:26,309 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5497 transitions. [2021-05-22 01:56:26,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5497 transitions. [2021-05-22 01:56:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:26,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:26,311 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:26,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2021-05-22 01:56:26,311 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:26,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2099869091, now seen corresponding path program 386 times [2021-05-22 01:56:26,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:26,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444684231] [2021-05-22 01:56:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:26,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:26,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444684231] [2021-05-22 01:56:26,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444684231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:26,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:26,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:26,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23389370] [2021-05-22 01:56:26,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:26,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:26,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:26,402 INFO L87 Difference]: Start difference. First operand 1394 states and 5497 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:26,454 INFO L93 Difference]: Finished difference Result 2941 states and 10791 transitions. [2021-05-22 01:56:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:26,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:26,459 INFO L225 Difference]: With dead ends: 2941 [2021-05-22 01:56:26,460 INFO L226 Difference]: Without dead ends: 2687 [2021-05-22 01:56:26,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-05-22 01:56:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1362. [2021-05-22 01:56:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.9448934606906687) internal successors, (5369), 1361 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 5369 transitions. [2021-05-22 01:56:26,492 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 5369 transitions. Word has length 25 [2021-05-22 01:56:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:26,492 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 5369 transitions. [2021-05-22 01:56:26,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 5369 transitions. [2021-05-22 01:56:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:26,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:26,494 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:26,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390 [2021-05-22 01:56:26,494 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash -102537601, now seen corresponding path program 387 times [2021-05-22 01:56:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726390142] [2021-05-22 01:56:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:26,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:26,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726390142] [2021-05-22 01:56:26,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726390142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:26,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:26,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966599768] [2021-05-22 01:56:26,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:26,583 INFO L87 Difference]: Start difference. First operand 1362 states and 5369 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:26,636 INFO L93 Difference]: Finished difference Result 2827 states and 10385 transitions. [2021-05-22 01:56:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:26,641 INFO L225 Difference]: With dead ends: 2827 [2021-05-22 01:56:26,642 INFO L226 Difference]: Without dead ends: 2668 [2021-05-22 01:56:26,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-05-22 01:56:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1378. [2021-05-22 01:56:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.933914306463326) internal successors, (5417), 1377 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5417 transitions. [2021-05-22 01:56:26,674 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5417 transitions. Word has length 25 [2021-05-22 01:56:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:26,674 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 5417 transitions. [2021-05-22 01:56:26,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5417 transitions. [2021-05-22 01:56:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:26,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:26,676 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:26,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391 [2021-05-22 01:56:26,676 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash 905760383, now seen corresponding path program 388 times [2021-05-22 01:56:26,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:26,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824449969] [2021-05-22 01:56:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:26,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:26,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824449969] [2021-05-22 01:56:26,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824449969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:26,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:26,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431476479] [2021-05-22 01:56:26,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:26,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:26,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:26,764 INFO L87 Difference]: Start difference. First operand 1378 states and 5417 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:26,830 INFO L93 Difference]: Finished difference Result 2855 states and 10473 transitions. [2021-05-22 01:56:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:26,835 INFO L225 Difference]: With dead ends: 2855 [2021-05-22 01:56:26,835 INFO L226 Difference]: Without dead ends: 2652 [2021-05-22 01:56:26,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-05-22 01:56:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1362. [2021-05-22 01:56:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.9390154298310067) internal successors, (5361), 1361 states have internal predecessors, (5361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 5361 transitions. [2021-05-22 01:56:26,866 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 5361 transitions. Word has length 25 [2021-05-22 01:56:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:26,867 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 5361 transitions. [2021-05-22 01:56:26,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 5361 transitions. [2021-05-22 01:56:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:26,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:26,868 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:26,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2021-05-22 01:56:26,868 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1700960641, now seen corresponding path program 389 times [2021-05-22 01:56:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460844413] [2021-05-22 01:56:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:26,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:26,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460844413] [2021-05-22 01:56:26,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460844413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:26,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:26,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:26,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163353352] [2021-05-22 01:56:26,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:26,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:26,960 INFO L87 Difference]: Start difference. First operand 1362 states and 5361 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:27,022 INFO L93 Difference]: Finished difference Result 2948 states and 10827 transitions. [2021-05-22 01:56:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:27,027 INFO L225 Difference]: With dead ends: 2948 [2021-05-22 01:56:27,027 INFO L226 Difference]: Without dead ends: 2761 [2021-05-22 01:56:27,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-05-22 01:56:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 1408. [2021-05-22 01:56:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.92181947405828) internal successors, (5518), 1407 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 5518 transitions. [2021-05-22 01:56:27,060 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 5518 transitions. Word has length 25 [2021-05-22 01:56:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:27,060 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 5518 transitions. [2021-05-22 01:56:27,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 5518 transitions. [2021-05-22 01:56:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:27,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:27,062 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:27,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2021-05-22 01:56:27,062 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2054100131, now seen corresponding path program 390 times [2021-05-22 01:56:27,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:27,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784318517] [2021-05-22 01:56:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:27,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784318517] [2021-05-22 01:56:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784318517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:27,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:27,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378859633] [2021-05-22 01:56:27,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:27,149 INFO L87 Difference]: Start difference. First operand 1408 states and 5518 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:27,204 INFO L93 Difference]: Finished difference Result 2983 states and 10916 transitions. [2021-05-22 01:56:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:27,210 INFO L225 Difference]: With dead ends: 2983 [2021-05-22 01:56:27,210 INFO L226 Difference]: Without dead ends: 2699 [2021-05-22 01:56:27,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-05-22 01:56:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 1346. [2021-05-22 01:56:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.9442379182156135) internal successors, (5305), 1345 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 5305 transitions. [2021-05-22 01:56:27,245 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 5305 transitions. Word has length 25 [2021-05-22 01:56:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:27,245 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 5305 transitions. [2021-05-22 01:56:27,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 5305 transitions. [2021-05-22 01:56:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:27,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:27,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:27,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2021-05-22 01:56:27,247 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1281055325, now seen corresponding path program 391 times [2021-05-22 01:56:27,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:27,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81327780] [2021-05-22 01:56:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:27,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:27,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81327780] [2021-05-22 01:56:27,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81327780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:27,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:27,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319644412] [2021-05-22 01:56:27,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:27,338 INFO L87 Difference]: Start difference. First operand 1346 states and 5305 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:27,391 INFO L93 Difference]: Finished difference Result 2828 states and 10385 transitions. [2021-05-22 01:56:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:27,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:27,396 INFO L225 Difference]: With dead ends: 2828 [2021-05-22 01:56:27,396 INFO L226 Difference]: Without dead ends: 2669 [2021-05-22 01:56:27,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-05-22 01:56:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1394. [2021-05-22 01:56:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.940416367552046) internal successors, (5489), 1393 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5489 transitions. [2021-05-22 01:56:27,428 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5489 transitions. Word has length 25 [2021-05-22 01:56:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:27,428 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5489 transitions. [2021-05-22 01:56:27,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5489 transitions. [2021-05-22 01:56:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:27,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:27,430 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:27,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2021-05-22 01:56:27,430 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash 272757341, now seen corresponding path program 392 times [2021-05-22 01:56:27,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:27,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078248424] [2021-05-22 01:56:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:27,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:27,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078248424] [2021-05-22 01:56:27,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078248424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:27,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:27,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:27,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868813741] [2021-05-22 01:56:27,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:27,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:27,520 INFO L87 Difference]: Start difference. First operand 1394 states and 5489 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:27,568 INFO L93 Difference]: Finished difference Result 2891 states and 10592 transitions. [2021-05-22 01:56:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:27,573 INFO L225 Difference]: With dead ends: 2891 [2021-05-22 01:56:27,573 INFO L226 Difference]: Without dead ends: 2637 [2021-05-22 01:56:27,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-05-22 01:56:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1362. [2021-05-22 01:56:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.9390154298310067) internal successors, (5361), 1361 states have internal predecessors, (5361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 5361 transitions. [2021-05-22 01:56:27,604 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 5361 transitions. Word has length 25 [2021-05-22 01:56:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:27,604 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 5361 transitions. [2021-05-22 01:56:27,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 5361 transitions. [2021-05-22 01:56:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:27,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:27,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:27,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2021-05-22 01:56:27,606 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1973353955, now seen corresponding path program 393 times [2021-05-22 01:56:27,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:27,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209588154] [2021-05-22 01:56:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:27,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:27,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209588154] [2021-05-22 01:56:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209588154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:27,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:27,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:27,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445632490] [2021-05-22 01:56:27,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:27,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:27,695 INFO L87 Difference]: Start difference. First operand 1362 states and 5361 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:27,743 INFO L93 Difference]: Finished difference Result 2733 states and 10034 transitions. [2021-05-22 01:56:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:27,748 INFO L225 Difference]: With dead ends: 2733 [2021-05-22 01:56:27,748 INFO L226 Difference]: Without dead ends: 2574 [2021-05-22 01:56:27,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-05-22 01:56:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 1378. [2021-05-22 01:56:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.9281045751633985) internal successors, (5409), 1377 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5409 transitions. [2021-05-22 01:56:27,790 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5409 transitions. Word has length 25 [2021-05-22 01:56:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:27,790 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 5409 transitions. [2021-05-22 01:56:27,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5409 transitions. [2021-05-22 01:56:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:27,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:27,792 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:27,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2021-05-22 01:56:27,792 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash 379341341, now seen corresponding path program 394 times [2021-05-22 01:56:27,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:27,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641087553] [2021-05-22 01:56:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:27,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:27,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641087553] [2021-05-22 01:56:27,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641087553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:27,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:27,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61656934] [2021-05-22 01:56:27,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:27,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:27,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:27,874 INFO L87 Difference]: Start difference. First operand 1378 states and 5409 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:27,936 INFO L93 Difference]: Finished difference Result 2621 states and 9697 transitions. [2021-05-22 01:56:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:27,941 INFO L225 Difference]: With dead ends: 2621 [2021-05-22 01:56:27,941 INFO L226 Difference]: Without dead ends: 2430 [2021-05-22 01:56:27,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-05-22 01:56:27,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1362. [2021-05-22 01:56:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.9331373989713447) internal successors, (5353), 1361 states have internal predecessors, (5353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 5353 transitions. [2021-05-22 01:56:27,978 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 5353 transitions. Word has length 25 [2021-05-22 01:56:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:27,978 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 5353 transitions. [2021-05-22 01:56:27,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 5353 transitions. [2021-05-22 01:56:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:27,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:27,980 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:27,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2021-05-22 01:56:27,980 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2067587613, now seen corresponding path program 395 times [2021-05-22 01:56:27,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:27,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801047739] [2021-05-22 01:56:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:28,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:28,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801047739] [2021-05-22 01:56:28,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801047739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:28,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:28,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:28,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971371559] [2021-05-22 01:56:28,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:28,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:28,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:28,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:28,072 INFO L87 Difference]: Start difference. First operand 1362 states and 5353 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:28,131 INFO L93 Difference]: Finished difference Result 2868 states and 10525 transitions. [2021-05-22 01:56:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:28,136 INFO L225 Difference]: With dead ends: 2868 [2021-05-22 01:56:28,137 INFO L226 Difference]: Without dead ends: 2693 [2021-05-22 01:56:28,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-22 01:56:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 1402. [2021-05-22 01:56:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.9207708779443253) internal successors, (5493), 1401 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 5493 transitions. [2021-05-22 01:56:28,169 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 5493 transitions. Word has length 25 [2021-05-22 01:56:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:28,169 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 5493 transitions. [2021-05-22 01:56:28,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 5493 transitions. [2021-05-22 01:56:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:28,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:28,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:28,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2021-05-22 01:56:28,171 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash 412063227, now seen corresponding path program 396 times [2021-05-22 01:56:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:28,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169920900] [2021-05-22 01:56:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:28,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:28,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169920900] [2021-05-22 01:56:28,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169920900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:28,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:28,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:28,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925554799] [2021-05-22 01:56:28,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:28,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:28,264 INFO L87 Difference]: Start difference. First operand 1402 states and 5493 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:28,310 INFO L93 Difference]: Finished difference Result 2820 states and 10325 transitions. [2021-05-22 01:56:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:28,315 INFO L225 Difference]: With dead ends: 2820 [2021-05-22 01:56:28,315 INFO L226 Difference]: Without dead ends: 2542 [2021-05-22 01:56:28,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-05-22 01:56:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1346. [2021-05-22 01:56:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.9382899628252788) internal successors, (5297), 1345 states have internal predecessors, (5297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 5297 transitions. [2021-05-22 01:56:28,348 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 5297 transitions. Word has length 25 [2021-05-22 01:56:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:28,348 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 5297 transitions. [2021-05-22 01:56:28,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 5297 transitions. [2021-05-22 01:56:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:28,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:28,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:28,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2021-05-22 01:56:28,349 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 119412159, now seen corresponding path program 397 times [2021-05-22 01:56:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:28,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353022873] [2021-05-22 01:56:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:28,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:28,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353022873] [2021-05-22 01:56:28,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353022873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:28,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:28,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29669970] [2021-05-22 01:56:28,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:28,432 INFO L87 Difference]: Start difference. First operand 1346 states and 5297 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:28,483 INFO L93 Difference]: Finished difference Result 2718 states and 9975 transitions. [2021-05-22 01:56:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:28,488 INFO L225 Difference]: With dead ends: 2718 [2021-05-22 01:56:28,488 INFO L226 Difference]: Without dead ends: 2559 [2021-05-22 01:56:28,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2021-05-22 01:56:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 1370. [2021-05-22 01:56:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.9306062819576333) internal successors, (5381), 1369 states have internal predecessors, (5381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5381 transitions. [2021-05-22 01:56:28,520 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5381 transitions. Word has length 25 [2021-05-22 01:56:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:28,520 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5381 transitions. [2021-05-22 01:56:28,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5381 transitions. [2021-05-22 01:56:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:28,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:28,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:28,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2021-05-22 01:56:28,522 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:28,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1127710143, now seen corresponding path program 398 times [2021-05-22 01:56:28,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:28,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132657423] [2021-05-22 01:56:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:28,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:28,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132657423] [2021-05-22 01:56:28,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132657423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:28,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:28,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:28,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892451365] [2021-05-22 01:56:28,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:28,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:28,604 INFO L87 Difference]: Start difference. First operand 1370 states and 5381 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:28,665 INFO L93 Difference]: Finished difference Result 2746 states and 10063 transitions. [2021-05-22 01:56:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:28,669 INFO L225 Difference]: With dead ends: 2746 [2021-05-22 01:56:28,669 INFO L226 Difference]: Without dead ends: 2543 [2021-05-22 01:56:28,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-05-22 01:56:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1354. [2021-05-22 01:56:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.9356984478935697) internal successors, (5325), 1353 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 5325 transitions. [2021-05-22 01:56:28,701 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 5325 transitions. Word has length 25 [2021-05-22 01:56:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:28,701 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 5325 transitions. [2021-05-22 01:56:28,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 5325 transitions. [2021-05-22 01:56:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:28,702 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:28,702 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:28,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2021-05-22 01:56:28,703 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1996667491, now seen corresponding path program 399 times [2021-05-22 01:56:28,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:28,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204780164] [2021-05-22 01:56:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:28,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:28,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204780164] [2021-05-22 01:56:28,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204780164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:28,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:28,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:28,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622426603] [2021-05-22 01:56:28,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:28,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:28,778 INFO L87 Difference]: Start difference. First operand 1354 states and 5325 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:28,828 INFO L93 Difference]: Finished difference Result 2674 states and 9815 transitions. [2021-05-22 01:56:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:28,832 INFO L225 Difference]: With dead ends: 2674 [2021-05-22 01:56:28,833 INFO L226 Difference]: Without dead ends: 2515 [2021-05-22 01:56:28,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-05-22 01:56:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1370. [2021-05-22 01:56:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.9247626004382763) internal successors, (5373), 1369 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5373 transitions. [2021-05-22 01:56:28,863 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5373 transitions. Word has length 25 [2021-05-22 01:56:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:28,863 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5373 transitions. [2021-05-22 01:56:28,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5373 transitions. [2021-05-22 01:56:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:28,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:28,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:28,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2021-05-22 01:56:28,865 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1652768191, now seen corresponding path program 400 times [2021-05-22 01:56:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:28,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976500204] [2021-05-22 01:56:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:28,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:28,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976500204] [2021-05-22 01:56:28,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976500204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:28,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:28,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455263081] [2021-05-22 01:56:28,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:28,940 INFO L87 Difference]: Start difference. First operand 1370 states and 5373 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:29,003 INFO L93 Difference]: Finished difference Result 2562 states and 9478 transitions. [2021-05-22 01:56:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:29,007 INFO L225 Difference]: With dead ends: 2562 [2021-05-22 01:56:29,007 INFO L226 Difference]: Without dead ends: 2371 [2021-05-22 01:56:29,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-05-22 01:56:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1354. [2021-05-22 01:56:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.9297856614929785) internal successors, (5317), 1353 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 5317 transitions. [2021-05-22 01:56:29,037 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 5317 transitions. Word has length 25 [2021-05-22 01:56:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:29,037 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 5317 transitions. [2021-05-22 01:56:29,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 5317 transitions. [2021-05-22 01:56:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:29,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:29,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:29,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2021-05-22 01:56:29,039 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1379875393, now seen corresponding path program 401 times [2021-05-22 01:56:29,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:29,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481518002] [2021-05-22 01:56:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:29,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481518002] [2021-05-22 01:56:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481518002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:29,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:29,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:29,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985696065] [2021-05-22 01:56:29,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:29,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:29,112 INFO L87 Difference]: Start difference. First operand 1354 states and 5317 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:29,174 INFO L93 Difference]: Finished difference Result 2710 states and 9947 transitions. [2021-05-22 01:56:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:29,179 INFO L225 Difference]: With dead ends: 2710 [2021-05-22 01:56:29,179 INFO L226 Difference]: Without dead ends: 2523 [2021-05-22 01:56:29,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-05-22 01:56:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1378. [2021-05-22 01:56:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.916485112563544) internal successors, (5393), 1377 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5393 transitions. [2021-05-22 01:56:29,210 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5393 transitions. Word has length 25 [2021-05-22 01:56:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:29,210 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 5393 transitions. [2021-05-22 01:56:29,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5393 transitions. [2021-05-22 01:56:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:29,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:29,212 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:29,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2021-05-22 01:56:29,212 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1522947357, now seen corresponding path program 402 times [2021-05-22 01:56:29,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:29,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065344256] [2021-05-22 01:56:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:29,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:29,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065344256] [2021-05-22 01:56:29,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065344256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:29,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:29,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:29,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922757959] [2021-05-22 01:56:29,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:29,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:29,286 INFO L87 Difference]: Start difference. First operand 1378 states and 5393 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:29,349 INFO L93 Difference]: Finished difference Result 2570 states and 9498 transitions. [2021-05-22 01:56:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:29,353 INFO L225 Difference]: With dead ends: 2570 [2021-05-22 01:56:29,354 INFO L226 Difference]: Without dead ends: 2363 [2021-05-22 01:56:29,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-05-22 01:56:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1346. [2021-05-22 01:56:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.9353159851301114) internal successors, (5293), 1345 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 5293 transitions. [2021-05-22 01:56:29,383 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 5293 transitions. Word has length 25 [2021-05-22 01:56:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:29,383 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 5293 transitions. [2021-05-22 01:56:29,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 5293 transitions. [2021-05-22 01:56:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:29,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:29,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:29,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2021-05-22 01:56:29,385 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1822121407, now seen corresponding path program 403 times [2021-05-22 01:56:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551520718] [2021-05-22 01:56:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:29,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:29,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551520718] [2021-05-22 01:56:29,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551520718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:29,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:29,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:29,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676696288] [2021-05-22 01:56:29,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:29,457 INFO L87 Difference]: Start difference. First operand 1346 states and 5293 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:29,524 INFO L93 Difference]: Finished difference Result 2915 states and 10741 transitions. [2021-05-22 01:56:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:29,530 INFO L225 Difference]: With dead ends: 2915 [2021-05-22 01:56:29,530 INFO L226 Difference]: Without dead ends: 2728 [2021-05-22 01:56:29,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-05-22 01:56:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1390. [2021-05-22 01:56:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.931605471562275) internal successors, (5461), 1389 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 5461 transitions. [2021-05-22 01:56:29,562 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 5461 transitions. Word has length 25 [2021-05-22 01:56:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:29,562 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 5461 transitions. [2021-05-22 01:56:29,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 5461 transitions. [2021-05-22 01:56:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:29,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:29,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:29,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2021-05-22 01:56:29,565 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 429976861, now seen corresponding path program 404 times [2021-05-22 01:56:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:29,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445498057] [2021-05-22 01:56:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:29,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:29,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445498057] [2021-05-22 01:56:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445498057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:29,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:29,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655629373] [2021-05-22 01:56:29,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:29,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:29,647 INFO L87 Difference]: Start difference. First operand 1390 states and 5461 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:29,720 INFO L93 Difference]: Finished difference Result 2903 states and 10677 transitions. [2021-05-22 01:56:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:29,725 INFO L225 Difference]: With dead ends: 2903 [2021-05-22 01:56:29,725 INFO L226 Difference]: Without dead ends: 2704 [2021-05-22 01:56:29,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-05-22 01:56:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 1366. [2021-05-22 01:56:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.936263736263736) internal successors, (5373), 1365 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 5373 transitions. [2021-05-22 01:56:29,757 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 5373 transitions. Word has length 25 [2021-05-22 01:56:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:29,757 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 5373 transitions. [2021-05-22 01:56:29,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 5373 transitions. [2021-05-22 01:56:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:29,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:29,759 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:29,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408 [2021-05-22 01:56:29,759 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1085981, now seen corresponding path program 405 times [2021-05-22 01:56:29,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:29,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994328188] [2021-05-22 01:56:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:29,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:29,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994328188] [2021-05-22 01:56:29,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994328188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:29,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:29,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:29,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405146450] [2021-05-22 01:56:29,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:29,833 INFO L87 Difference]: Start difference. First operand 1366 states and 5373 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:29,900 INFO L93 Difference]: Finished difference Result 2938 states and 10788 transitions. [2021-05-22 01:56:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:29,905 INFO L225 Difference]: With dead ends: 2938 [2021-05-22 01:56:29,906 INFO L226 Difference]: Without dead ends: 2751 [2021-05-22 01:56:29,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-05-22 01:56:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 1412. [2021-05-22 01:56:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.919206236711552) internal successors, (5530), 1411 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5530 transitions. [2021-05-22 01:56:29,938 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5530 transitions. Word has length 25 [2021-05-22 01:56:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:29,938 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 5530 transitions. [2021-05-22 01:56:29,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5530 transitions. [2021-05-22 01:56:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:29,940 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:29,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:29,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2021-05-22 01:56:29,940 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1369846429, now seen corresponding path program 406 times [2021-05-22 01:56:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:29,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626163346] [2021-05-22 01:56:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:30,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:30,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626163346] [2021-05-22 01:56:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626163346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:30,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:30,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:30,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984779203] [2021-05-22 01:56:30,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:30,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:30,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:30,013 INFO L87 Difference]: Start difference. First operand 1412 states and 5530 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:30,062 INFO L93 Difference]: Finished difference Result 2973 states and 10877 transitions. [2021-05-22 01:56:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:30,067 INFO L225 Difference]: With dead ends: 2973 [2021-05-22 01:56:30,068 INFO L226 Difference]: Without dead ends: 2705 [2021-05-22 01:56:30,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-05-22 01:56:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1366. [2021-05-22 01:56:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.9216117216117214) internal successors, (5353), 1365 states have internal predecessors, (5353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 5353 transitions. [2021-05-22 01:56:30,099 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 5353 transitions. Word has length 25 [2021-05-22 01:56:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:30,099 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 5353 transitions. [2021-05-22 01:56:30,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 5353 transitions. [2021-05-22 01:56:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:30,101 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:30,101 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:30,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410 [2021-05-22 01:56:30,101 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash 365343355, now seen corresponding path program 407 times [2021-05-22 01:56:30,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:30,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492261508] [2021-05-22 01:56:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:30,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492261508] [2021-05-22 01:56:30,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492261508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:30,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:30,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:30,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073200417] [2021-05-22 01:56:30,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:30,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:30,183 INFO L87 Difference]: Start difference. First operand 1366 states and 5353 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:30,247 INFO L93 Difference]: Finished difference Result 2908 states and 10665 transitions. [2021-05-22 01:56:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:30,252 INFO L225 Difference]: With dead ends: 2908 [2021-05-22 01:56:30,252 INFO L226 Difference]: Without dead ends: 2733 [2021-05-22 01:56:30,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-05-22 01:56:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1406. [2021-05-22 01:56:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 3.9096085409252668) internal successors, (5493), 1405 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 5493 transitions. [2021-05-22 01:56:30,284 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 5493 transitions. Word has length 25 [2021-05-22 01:56:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:30,284 INFO L482 AbstractCegarLoop]: Abstraction has 1406 states and 5493 transitions. [2021-05-22 01:56:30,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 5493 transitions. [2021-05-22 01:56:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:30,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:30,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:30,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2021-05-22 01:56:30,286 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 583694941, now seen corresponding path program 408 times [2021-05-22 01:56:30,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:30,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989792177] [2021-05-22 01:56:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:30,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:30,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989792177] [2021-05-22 01:56:30,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989792177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:30,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:30,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:30,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379573300] [2021-05-22 01:56:30,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:30,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:30,369 INFO L87 Difference]: Start difference. First operand 1406 states and 5493 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:30,424 INFO L93 Difference]: Finished difference Result 2860 states and 10465 transitions. [2021-05-22 01:56:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:30,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:30,429 INFO L225 Difference]: With dead ends: 2860 [2021-05-22 01:56:30,429 INFO L226 Difference]: Without dead ends: 2570 [2021-05-22 01:56:30,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-05-22 01:56:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1338. [2021-05-22 01:56:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.9409124906507107) internal successors, (5269), 1337 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 5269 transitions. [2021-05-22 01:56:30,460 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 5269 transitions. Word has length 25 [2021-05-22 01:56:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:30,460 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 5269 transitions. [2021-05-22 01:56:30,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 5269 transitions. [2021-05-22 01:56:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:30,462 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:30,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:30,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2021-05-22 01:56:30,462 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:30,462 INFO L82 PathProgramCache]: Analyzing trace with hash 517434815, now seen corresponding path program 409 times [2021-05-22 01:56:30,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:30,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774027038] [2021-05-22 01:56:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:30,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:30,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774027038] [2021-05-22 01:56:30,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774027038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:30,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:30,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504953318] [2021-05-22 01:56:30,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:30,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:30,557 INFO L87 Difference]: Start difference. First operand 1338 states and 5269 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:30,607 INFO L93 Difference]: Finished difference Result 2810 states and 10302 transitions. [2021-05-22 01:56:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:30,612 INFO L225 Difference]: With dead ends: 2810 [2021-05-22 01:56:30,613 INFO L226 Difference]: Without dead ends: 2651 [2021-05-22 01:56:30,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-05-22 01:56:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 1370. [2021-05-22 01:56:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.9306062819576333) internal successors, (5381), 1369 states have internal predecessors, (5381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 5381 transitions. [2021-05-22 01:56:30,644 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 5381 transitions. Word has length 25 [2021-05-22 01:56:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:30,645 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 5381 transitions. [2021-05-22 01:56:30,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 5381 transitions. [2021-05-22 01:56:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:30,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:30,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:30,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413 [2021-05-22 01:56:30,646 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:30,647 INFO L82 PathProgramCache]: Analyzing trace with hash -490863169, now seen corresponding path program 410 times [2021-05-22 01:56:30,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:30,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38360068] [2021-05-22 01:56:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:30,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:30,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38360068] [2021-05-22 01:56:30,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38360068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:30,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:30,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:30,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396214300] [2021-05-22 01:56:30,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:30,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:30,742 INFO L87 Difference]: Start difference. First operand 1370 states and 5381 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:30,793 INFO L93 Difference]: Finished difference Result 2873 states and 10509 transitions. [2021-05-22 01:56:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:30,798 INFO L225 Difference]: With dead ends: 2873 [2021-05-22 01:56:30,798 INFO L226 Difference]: Without dead ends: 2619 [2021-05-22 01:56:30,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-05-22 01:56:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1338. [2021-05-22 01:56:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.9289454001495887) internal successors, (5253), 1337 states have internal predecessors, (5253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 5253 transitions. [2021-05-22 01:56:30,829 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 5253 transitions. Word has length 25 [2021-05-22 01:56:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:30,829 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 5253 transitions. [2021-05-22 01:56:30,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 5253 transitions. [2021-05-22 01:56:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:30,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:30,831 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:30,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414 [2021-05-22 01:56:30,831 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash 523187583, now seen corresponding path program 411 times [2021-05-22 01:56:30,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:30,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394792057] [2021-05-22 01:56:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:30,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:30,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394792057] [2021-05-22 01:56:30,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394792057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:30,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:30,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:30,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199760563] [2021-05-22 01:56:30,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:30,920 INFO L87 Difference]: Start difference. First operand 1338 states and 5253 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:30,974 INFO L93 Difference]: Finished difference Result 2755 states and 10091 transitions. [2021-05-22 01:56:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:30,979 INFO L225 Difference]: With dead ends: 2755 [2021-05-22 01:56:30,979 INFO L226 Difference]: Without dead ends: 2596 [2021-05-22 01:56:30,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-05-22 01:56:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1354. [2021-05-22 01:56:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.917960088691796) internal successors, (5301), 1353 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 5301 transitions. [2021-05-22 01:56:31,010 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 5301 transitions. Word has length 25 [2021-05-22 01:56:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:31,010 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 5301 transitions. [2021-05-22 01:56:31,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 5301 transitions. [2021-05-22 01:56:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:31,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:31,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:31,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415 [2021-05-22 01:56:31,012 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2091283073, now seen corresponding path program 412 times [2021-05-22 01:56:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:31,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040373483] [2021-05-22 01:56:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:31,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:31,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040373483] [2021-05-22 01:56:31,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040373483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:31,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:31,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834620511] [2021-05-22 01:56:31,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:31,099 INFO L87 Difference]: Start difference. First operand 1354 states and 5301 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:31,163 INFO L93 Difference]: Finished difference Result 2779 states and 10167 transitions. [2021-05-22 01:56:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:31,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:31,168 INFO L225 Difference]: With dead ends: 2779 [2021-05-22 01:56:31,168 INFO L226 Difference]: Without dead ends: 2580 [2021-05-22 01:56:31,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2021-05-22 01:56:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 1338. [2021-05-22 01:56:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.9229618548990275) internal successors, (5245), 1337 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 5245 transitions. [2021-05-22 01:56:31,199 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 5245 transitions. Word has length 25 [2021-05-22 01:56:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:31,199 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 5245 transitions. [2021-05-22 01:56:31,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 5245 transitions. [2021-05-22 01:56:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:31,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:31,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:31,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416 [2021-05-22 01:56:31,201 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -403036801, now seen corresponding path program 413 times [2021-05-22 01:56:31,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:31,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438518385] [2021-05-22 01:56:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:31,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:31,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438518385] [2021-05-22 01:56:31,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438518385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:31,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:31,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625027094] [2021-05-22 01:56:31,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:31,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:31,299 INFO L87 Difference]: Start difference. First operand 1338 states and 5245 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:31,360 INFO L93 Difference]: Finished difference Result 2870 states and 10514 transitions. [2021-05-22 01:56:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:31,365 INFO L225 Difference]: With dead ends: 2870 [2021-05-22 01:56:31,365 INFO L226 Difference]: Without dead ends: 2687 [2021-05-22 01:56:31,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-05-22 01:56:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1382. [2021-05-22 01:56:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1381 states have (on average 3.9080376538740045) internal successors, (5397), 1381 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 5397 transitions. [2021-05-22 01:56:31,397 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 5397 transitions. Word has length 25 [2021-05-22 01:56:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:31,397 INFO L482 AbstractCegarLoop]: Abstraction has 1382 states and 5397 transitions. [2021-05-22 01:56:31,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 5397 transitions. [2021-05-22 01:56:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:31,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:31,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:31,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2021-05-22 01:56:31,399 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1407368739, now seen corresponding path program 414 times [2021-05-22 01:56:31,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:31,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541865719] [2021-05-22 01:56:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:31,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:31,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541865719] [2021-05-22 01:56:31,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541865719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:31,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:31,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:31,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137419073] [2021-05-22 01:56:31,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:31,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:31,500 INFO L87 Difference]: Start difference. First operand 1382 states and 5397 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:31,550 INFO L93 Difference]: Finished difference Result 2909 states and 10617 transitions. [2021-05-22 01:56:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:31,555 INFO L225 Difference]: With dead ends: 2909 [2021-05-22 01:56:31,555 INFO L226 Difference]: Without dead ends: 2627 [2021-05-22 01:56:31,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-05-22 01:56:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1322. [2021-05-22 01:56:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 3.9280847842543527) internal successors, (5189), 1321 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 5189 transitions. [2021-05-22 01:56:31,586 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 5189 transitions. Word has length 25 [2021-05-22 01:56:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:31,586 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 5189 transitions. [2021-05-22 01:56:31,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 5189 transitions. [2021-05-22 01:56:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:31,588 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:31,588 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:31,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2021-05-22 01:56:31,588 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1975481885, now seen corresponding path program 415 times [2021-05-22 01:56:31,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:31,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765785905] [2021-05-22 01:56:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:31,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:31,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765785905] [2021-05-22 01:56:31,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765785905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:31,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:31,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:31,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737149155] [2021-05-22 01:56:31,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:31,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:31,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:31,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:31,683 INFO L87 Difference]: Start difference. First operand 1322 states and 5189 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:31,736 INFO L93 Difference]: Finished difference Result 2750 states and 10050 transitions. [2021-05-22 01:56:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:31,740 INFO L225 Difference]: With dead ends: 2750 [2021-05-22 01:56:31,741 INFO L226 Difference]: Without dead ends: 2591 [2021-05-22 01:56:31,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-05-22 01:56:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1322. [2021-05-22 01:56:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 3.915972747918244) internal successors, (5173), 1321 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 5173 transitions. [2021-05-22 01:56:31,772 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 5173 transitions. Word has length 25 [2021-05-22 01:56:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:31,772 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 5173 transitions. [2021-05-22 01:56:31,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 5173 transitions. [2021-05-22 01:56:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:31,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:31,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:31,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2021-05-22 01:56:31,774 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:31,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:31,774 INFO L82 PathProgramCache]: Analyzing trace with hash 967183901, now seen corresponding path program 416 times [2021-05-22 01:56:31,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:31,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240048171] [2021-05-22 01:56:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:31,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240048171] [2021-05-22 01:56:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240048171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:31,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:31,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:31,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701490618] [2021-05-22 01:56:31,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:31,868 INFO L87 Difference]: Start difference. First operand 1322 states and 5173 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:31,916 INFO L93 Difference]: Finished difference Result 2813 states and 10257 transitions. [2021-05-22 01:56:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:31,921 INFO L225 Difference]: With dead ends: 2813 [2021-05-22 01:56:31,921 INFO L226 Difference]: Without dead ends: 2559 [2021-05-22 01:56:31,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2021-05-22 01:56:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 1290. [2021-05-22 01:56:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.91388673390225) internal successors, (5045), 1289 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 5045 transitions. [2021-05-22 01:56:31,959 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 5045 transitions. Word has length 25 [2021-05-22 01:56:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:31,960 INFO L482 AbstractCegarLoop]: Abstraction has 1290 states and 5045 transitions. [2021-05-22 01:56:31,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 5045 transitions. [2021-05-22 01:56:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:31,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:31,961 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:31,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2021-05-22 01:56:31,961 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash 276432255, now seen corresponding path program 417 times [2021-05-22 01:56:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256328538] [2021-05-22 01:56:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:32,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256328538] [2021-05-22 01:56:32,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256328538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:32,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:32,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:32,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698145040] [2021-05-22 01:56:32,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:32,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:32,050 INFO L87 Difference]: Start difference. First operand 1290 states and 5045 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:32,099 INFO L93 Difference]: Finished difference Result 2655 states and 9699 transitions. [2021-05-22 01:56:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:32,104 INFO L225 Difference]: With dead ends: 2655 [2021-05-22 01:56:32,104 INFO L226 Difference]: Without dead ends: 2496 [2021-05-22 01:56:32,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-22 01:56:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1306. [2021-05-22 01:56:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.9026819923371647) internal successors, (5093), 1305 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5093 transitions. [2021-05-22 01:56:32,133 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5093 transitions. Word has length 25 [2021-05-22 01:56:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:32,133 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5093 transitions. [2021-05-22 01:56:32,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5093 transitions. [2021-05-22 01:56:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:32,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:32,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:32,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421 [2021-05-22 01:56:32,135 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1665839745, now seen corresponding path program 418 times [2021-05-22 01:56:32,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:32,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655856556] [2021-05-22 01:56:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:32,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:32,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655856556] [2021-05-22 01:56:32,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655856556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:32,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:32,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:32,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065037238] [2021-05-22 01:56:32,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:32,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:32,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:32,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:32,224 INFO L87 Difference]: Start difference. First operand 1306 states and 5093 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:32,310 INFO L93 Difference]: Finished difference Result 2543 states and 9362 transitions. [2021-05-22 01:56:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:32,315 INFO L225 Difference]: With dead ends: 2543 [2021-05-22 01:56:32,315 INFO L226 Difference]: Without dead ends: 2352 [2021-05-22 01:56:32,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-05-22 01:56:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1290. [2021-05-22 01:56:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.9076803723816913) internal successors, (5037), 1289 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 5037 transitions. [2021-05-22 01:56:32,344 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 5037 transitions. Word has length 25 [2021-05-22 01:56:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:32,344 INFO L482 AbstractCegarLoop]: Abstraction has 1290 states and 5037 transitions. [2021-05-22 01:56:32,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 5037 transitions. [2021-05-22 01:56:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:32,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:32,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:32,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2021-05-22 01:56:32,346 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash 22406527, now seen corresponding path program 419 times [2021-05-22 01:56:32,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:32,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101579073] [2021-05-22 01:56:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:32,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:32,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101579073] [2021-05-22 01:56:32,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101579073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:32,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:32,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728296075] [2021-05-22 01:56:32,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:32,444 INFO L87 Difference]: Start difference. First operand 1290 states and 5037 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:32,505 INFO L93 Difference]: Finished difference Result 2790 states and 10190 transitions. [2021-05-22 01:56:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:32,510 INFO L225 Difference]: With dead ends: 2790 [2021-05-22 01:56:32,510 INFO L226 Difference]: Without dead ends: 2615 [2021-05-22 01:56:32,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-05-22 01:56:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 1330. [2021-05-22 01:56:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.8954100827689992) internal successors, (5177), 1329 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 5177 transitions. [2021-05-22 01:56:32,540 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 5177 transitions. Word has length 25 [2021-05-22 01:56:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:32,540 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 5177 transitions. [2021-05-22 01:56:32,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 5177 transitions. [2021-05-22 01:56:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:32,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:32,542 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:32,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2021-05-22 01:56:32,542 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1633117859, now seen corresponding path program 420 times [2021-05-22 01:56:32,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:32,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370033158] [2021-05-22 01:56:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:32,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:32,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370033158] [2021-05-22 01:56:32,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370033158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:32,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:32,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:32,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057630427] [2021-05-22 01:56:32,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:32,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:32,640 INFO L87 Difference]: Start difference. First operand 1330 states and 5177 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:32,689 INFO L93 Difference]: Finished difference Result 2742 states and 9990 transitions. [2021-05-22 01:56:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:32,693 INFO L225 Difference]: With dead ends: 2742 [2021-05-22 01:56:32,693 INFO L226 Difference]: Without dead ends: 2464 [2021-05-22 01:56:32,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-05-22 01:56:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1274. [2021-05-22 01:56:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.912804399057345) internal successors, (4981), 1273 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4981 transitions. [2021-05-22 01:56:32,722 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4981 transitions. Word has length 25 [2021-05-22 01:56:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:32,722 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4981 transitions. [2021-05-22 01:56:32,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4981 transitions. [2021-05-22 01:56:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:32,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:32,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:32,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2021-05-22 01:56:32,724 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash -227939009, now seen corresponding path program 421 times [2021-05-22 01:56:32,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:32,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730850941] [2021-05-22 01:56:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:32,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730850941] [2021-05-22 01:56:32,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730850941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:32,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:32,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:32,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022075378] [2021-05-22 01:56:32,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:32,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:32,804 INFO L87 Difference]: Start difference. First operand 1274 states and 4981 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:32,855 INFO L93 Difference]: Finished difference Result 2600 states and 9504 transitions. [2021-05-22 01:56:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:32,860 INFO L225 Difference]: With dead ends: 2600 [2021-05-22 01:56:32,860 INFO L226 Difference]: Without dead ends: 2441 [2021-05-22 01:56:32,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-05-22 01:56:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1298. [2021-05-22 01:56:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.905165767154973) internal successors, (5065), 1297 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 5065 transitions. [2021-05-22 01:56:32,889 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 5065 transitions. Word has length 25 [2021-05-22 01:56:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:32,889 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 5065 transitions. [2021-05-22 01:56:32,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 5065 transitions. [2021-05-22 01:56:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:32,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:32,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:32,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2021-05-22 01:56:32,892 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:32,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1452557631, now seen corresponding path program 422 times [2021-05-22 01:56:32,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:32,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160164336] [2021-05-22 01:56:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:32,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:32,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160164336] [2021-05-22 01:56:32,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160164336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:32,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:32,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:32,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606185706] [2021-05-22 01:56:32,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:32,972 INFO L87 Difference]: Start difference. First operand 1298 states and 5065 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:33,035 INFO L93 Difference]: Finished difference Result 2624 states and 9580 transitions. [2021-05-22 01:56:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:33,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:33,040 INFO L225 Difference]: With dead ends: 2624 [2021-05-22 01:56:33,040 INFO L226 Difference]: Without dead ends: 2425 [2021-05-22 01:56:33,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-05-22 01:56:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1282. [2021-05-22 01:56:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.910226385636222) internal successors, (5009), 1281 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 5009 transitions. [2021-05-22 01:56:33,069 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 5009 transitions. Word has length 25 [2021-05-22 01:56:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:33,069 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 5009 transitions. [2021-05-22 01:56:33,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 5009 transitions. [2021-05-22 01:56:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:33,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:33,070 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:33,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426 [2021-05-22 01:56:33,070 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1074735971, now seen corresponding path program 423 times [2021-05-22 01:56:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:33,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447624912] [2021-05-22 01:56:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:33,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:33,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447624912] [2021-05-22 01:56:33,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447624912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:33,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:33,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:33,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256548953] [2021-05-22 01:56:33,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:33,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:33,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:33,152 INFO L87 Difference]: Start difference. First operand 1282 states and 5009 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:33,224 INFO L93 Difference]: Finished difference Result 2544 states and 9292 transitions. [2021-05-22 01:56:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:33,229 INFO L225 Difference]: With dead ends: 2544 [2021-05-22 01:56:33,229 INFO L226 Difference]: Without dead ends: 2385 [2021-05-22 01:56:33,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-05-22 01:56:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1298. [2021-05-22 01:56:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.8989976869699308) internal successors, (5057), 1297 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 5057 transitions. [2021-05-22 01:56:33,260 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 5057 transitions. Word has length 25 [2021-05-22 01:56:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:33,260 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 5057 transitions. [2021-05-22 01:56:33,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 5057 transitions. [2021-05-22 01:56:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:33,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:33,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:33,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2021-05-22 01:56:33,262 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash -432396993, now seen corresponding path program 424 times [2021-05-22 01:56:33,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:33,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306179269] [2021-05-22 01:56:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:33,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306179269] [2021-05-22 01:56:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306179269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:33,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:33,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:33,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835227166] [2021-05-22 01:56:33,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:33,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:33,344 INFO L87 Difference]: Start difference. First operand 1298 states and 5057 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:33,407 INFO L93 Difference]: Finished difference Result 2432 states and 8955 transitions. [2021-05-22 01:56:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:33,411 INFO L225 Difference]: With dead ends: 2432 [2021-05-22 01:56:33,411 INFO L226 Difference]: Without dead ends: 2241 [2021-05-22 01:56:33,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-05-22 01:56:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1282. [2021-05-22 01:56:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.9039812646370025) internal successors, (5001), 1281 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 5001 transitions. [2021-05-22 01:56:33,442 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 5001 transitions. Word has length 25 [2021-05-22 01:56:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:33,442 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 5001 transitions. [2021-05-22 01:56:33,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 5001 transitions. [2021-05-22 01:56:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:33,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:33,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:33,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428 [2021-05-22 01:56:33,444 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:33,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1055027905, now seen corresponding path program 425 times [2021-05-22 01:56:33,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:33,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492266320] [2021-05-22 01:56:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:33,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:33,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492266320] [2021-05-22 01:56:33,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492266320] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:33,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:33,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:33,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810491840] [2021-05-22 01:56:33,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:33,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:33,529 INFO L87 Difference]: Start difference. First operand 1282 states and 5001 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:33,591 INFO L93 Difference]: Finished difference Result 2448 states and 9027 transitions. [2021-05-22 01:56:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:33,595 INFO L225 Difference]: With dead ends: 2448 [2021-05-22 01:56:33,595 INFO L226 Difference]: Without dead ends: 2265 [2021-05-22 01:56:33,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-05-22 01:56:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1306. [2021-05-22 01:56:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8904214559386974) internal successors, (5077), 1305 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5077 transitions. [2021-05-22 01:56:33,624 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5077 transitions. Word has length 25 [2021-05-22 01:56:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:33,624 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5077 transitions. [2021-05-22 01:56:33,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5077 transitions. [2021-05-22 01:56:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:33,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:33,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:33,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429 [2021-05-22 01:56:33,626 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:33,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1196602397, now seen corresponding path program 426 times [2021-05-22 01:56:33,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:33,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728349967] [2021-05-22 01:56:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:33,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:33,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728349967] [2021-05-22 01:56:33,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728349967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:33,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:33,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995369786] [2021-05-22 01:56:33,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:33,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:33,708 INFO L87 Difference]: Start difference. First operand 1306 states and 5077 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:33,768 INFO L93 Difference]: Finished difference Result 2264 states and 8414 transitions. [2021-05-22 01:56:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:33,772 INFO L225 Difference]: With dead ends: 2264 [2021-05-22 01:56:33,772 INFO L226 Difference]: Without dead ends: 2057 [2021-05-22 01:56:33,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-05-22 01:56:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1274. [2021-05-22 01:56:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.9096622152395915) internal successors, (4977), 1273 states have internal predecessors, (4977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4977 transitions. [2021-05-22 01:56:33,802 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4977 transitions. Word has length 25 [2021-05-22 01:56:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:33,802 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4977 transitions. [2021-05-22 01:56:33,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4977 transitions. [2021-05-22 01:56:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:33,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:33,804 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:33,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2021-05-22 01:56:33,804 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2146968895, now seen corresponding path program 427 times [2021-05-22 01:56:33,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:33,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914205831] [2021-05-22 01:56:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:33,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914205831] [2021-05-22 01:56:33,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914205831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:33,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:33,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:33,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718722054] [2021-05-22 01:56:33,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:33,893 INFO L87 Difference]: Start difference. First operand 1274 states and 4977 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:33,953 INFO L93 Difference]: Finished difference Result 2823 states and 10363 transitions. [2021-05-22 01:56:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:33,958 INFO L225 Difference]: With dead ends: 2823 [2021-05-22 01:56:33,959 INFO L226 Difference]: Without dead ends: 2640 [2021-05-22 01:56:33,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-05-22 01:56:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1318. [2021-05-22 01:56:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.906605922551253) internal successors, (5145), 1317 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 5145 transitions. [2021-05-22 01:56:33,989 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 5145 transitions. Word has length 25 [2021-05-22 01:56:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:33,989 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 5145 transitions. [2021-05-22 01:56:33,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 5145 transitions. [2021-05-22 01:56:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:33,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:33,990 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:33,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2021-05-22 01:56:33,991 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash 103631901, now seen corresponding path program 428 times [2021-05-22 01:56:33,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:33,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742830758] [2021-05-22 01:56:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:34,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:34,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742830758] [2021-05-22 01:56:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742830758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:34,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:34,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:34,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352448600] [2021-05-22 01:56:34,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:34,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:34,079 INFO L87 Difference]: Start difference. First operand 1318 states and 5145 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:34,149 INFO L93 Difference]: Finished difference Result 2815 states and 10311 transitions. [2021-05-22 01:56:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:34,154 INFO L225 Difference]: With dead ends: 2815 [2021-05-22 01:56:34,154 INFO L226 Difference]: Without dead ends: 2616 [2021-05-22 01:56:34,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-05-22 01:56:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1294. [2021-05-22 01:56:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9110595514307813) internal successors, (5057), 1293 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5057 transitions. [2021-05-22 01:56:34,184 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5057 transitions. Word has length 25 [2021-05-22 01:56:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:34,184 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5057 transitions. [2021-05-22 01:56:34,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5057 transitions. [2021-05-22 01:56:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:34,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:34,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:34,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2021-05-22 01:56:34,186 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 325933469, now seen corresponding path program 429 times [2021-05-22 01:56:34,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:34,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785634556] [2021-05-22 01:56:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:34,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:34,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785634556] [2021-05-22 01:56:34,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785634556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:34,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:34,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017312919] [2021-05-22 01:56:34,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:34,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:34,298 INFO L87 Difference]: Start difference. First operand 1294 states and 5057 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:34,366 INFO L93 Difference]: Finished difference Result 2751 states and 10075 transitions. [2021-05-22 01:56:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:34,371 INFO L225 Difference]: With dead ends: 2751 [2021-05-22 01:56:34,371 INFO L226 Difference]: Without dead ends: 2568 [2021-05-22 01:56:34,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-05-22 01:56:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1338. [2021-05-22 01:56:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.8960359012715036) internal successors, (5209), 1337 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 5209 transitions. [2021-05-22 01:56:34,402 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 5209 transitions. Word has length 25 [2021-05-22 01:56:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 5209 transitions. [2021-05-22 01:56:34,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 5209 transitions. [2021-05-22 01:56:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:34,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:34,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:34,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2021-05-22 01:56:34,403 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1043501469, now seen corresponding path program 430 times [2021-05-22 01:56:34,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:34,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867170432] [2021-05-22 01:56:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:34,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:34,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867170432] [2021-05-22 01:56:34,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867170432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:34,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:34,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:34,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936333614] [2021-05-22 01:56:34,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:34,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:34,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:34,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:34,502 INFO L87 Difference]: Start difference. First operand 1338 states and 5209 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:34,552 INFO L93 Difference]: Finished difference Result 2790 states and 10178 transitions. [2021-05-22 01:56:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:34,557 INFO L225 Difference]: With dead ends: 2790 [2021-05-22 01:56:34,557 INFO L226 Difference]: Without dead ends: 2524 [2021-05-22 01:56:34,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-05-22 01:56:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1294. [2021-05-22 01:56:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.8955916473317864) internal successors, (5037), 1293 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5037 transitions. [2021-05-22 01:56:34,586 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5037 transitions. Word has length 25 [2021-05-22 01:56:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:34,586 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5037 transitions. [2021-05-22 01:56:34,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5037 transitions. [2021-05-22 01:56:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:34,588 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:34,588 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:34,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2021-05-22 01:56:34,588 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1308281083, now seen corresponding path program 431 times [2021-05-22 01:56:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:34,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802385676] [2021-05-22 01:56:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:34,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:34,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802385676] [2021-05-22 01:56:34,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802385676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:34,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:34,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:34,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033195621] [2021-05-22 01:56:34,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:34,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:34,686 INFO L87 Difference]: Start difference. First operand 1294 states and 5037 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:34,754 INFO L93 Difference]: Finished difference Result 2691 states and 9819 transitions. [2021-05-22 01:56:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:34,759 INFO L225 Difference]: With dead ends: 2691 [2021-05-22 01:56:34,759 INFO L226 Difference]: Without dead ends: 2516 [2021-05-22 01:56:34,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-05-22 01:56:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1334. [2021-05-22 01:56:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.883720930232558) internal successors, (5177), 1333 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 5177 transitions. [2021-05-22 01:56:34,789 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 5177 transitions. Word has length 25 [2021-05-22 01:56:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:34,789 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 5177 transitions. [2021-05-22 01:56:34,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 5177 transitions. [2021-05-22 01:56:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:34,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:34,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:34,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2021-05-22 01:56:34,791 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1526632669, now seen corresponding path program 432 times [2021-05-22 01:56:34,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:34,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517145693] [2021-05-22 01:56:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:34,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:34,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517145693] [2021-05-22 01:56:34,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517145693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:34,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:34,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:34,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332010569] [2021-05-22 01:56:34,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:34,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:34,889 INFO L87 Difference]: Start difference. First operand 1334 states and 5177 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:34,946 INFO L93 Difference]: Finished difference Result 2643 states and 9619 transitions. [2021-05-22 01:56:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:34,951 INFO L225 Difference]: With dead ends: 2643 [2021-05-22 01:56:34,951 INFO L226 Difference]: Without dead ends: 2353 [2021-05-22 01:56:34,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-05-22 01:56:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1266. [2021-05-22 01:56:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.915415019762846) internal successors, (4953), 1265 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4953 transitions. [2021-05-22 01:56:34,985 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4953 transitions. Word has length 25 [2021-05-22 01:56:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:34,985 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4953 transitions. [2021-05-22 01:56:34,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4953 transitions. [2021-05-22 01:56:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:34,987 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:34,987 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:34,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2021-05-22 01:56:34,987 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:34,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:34,987 INFO L82 PathProgramCache]: Analyzing trace with hash -862211999, now seen corresponding path program 433 times [2021-05-22 01:56:34,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:34,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551530428] [2021-05-22 01:56:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:35,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:35,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551530428] [2021-05-22 01:56:35,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551530428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:35,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:35,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:35,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628791637] [2021-05-22 01:56:35,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:35,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:35,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:35,072 INFO L87 Difference]: Start difference. First operand 1266 states and 4953 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:35,129 INFO L93 Difference]: Finished difference Result 2549 states and 9317 transitions. [2021-05-22 01:56:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:35,134 INFO L225 Difference]: With dead ends: 2549 [2021-05-22 01:56:35,134 INFO L226 Difference]: Without dead ends: 2390 [2021-05-22 01:56:35,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-05-22 01:56:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1294. [2021-05-22 01:56:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9110595514307813) internal successors, (5057), 1293 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5057 transitions. [2021-05-22 01:56:35,162 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5057 transitions. Word has length 25 [2021-05-22 01:56:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:35,162 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5057 transitions. [2021-05-22 01:56:35,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5057 transitions. [2021-05-22 01:56:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:35,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:35,164 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:35,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2021-05-22 01:56:35,164 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash 146085985, now seen corresponding path program 434 times [2021-05-22 01:56:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:35,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108817254] [2021-05-22 01:56:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:35,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108817254] [2021-05-22 01:56:35,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108817254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:35,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:35,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:35,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477366355] [2021-05-22 01:56:35,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:35,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:35,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:35,248 INFO L87 Difference]: Start difference. First operand 1294 states and 5057 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:35,315 INFO L93 Difference]: Finished difference Result 2577 states and 9405 transitions. [2021-05-22 01:56:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:35,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:35,320 INFO L225 Difference]: With dead ends: 2577 [2021-05-22 01:56:35,320 INFO L226 Difference]: Without dead ends: 2374 [2021-05-22 01:56:35,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-05-22 01:56:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1278. [2021-05-22 01:56:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.9162098668754894) internal successors, (5001), 1277 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 5001 transitions. [2021-05-22 01:56:35,349 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 5001 transitions. Word has length 25 [2021-05-22 01:56:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:35,349 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 5001 transitions. [2021-05-22 01:56:35,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 5001 transitions. [2021-05-22 01:56:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:35,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:35,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:35,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2021-05-22 01:56:35,350 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1709008961, now seen corresponding path program 435 times [2021-05-22 01:56:35,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:35,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162257171] [2021-05-22 01:56:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:35,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162257171] [2021-05-22 01:56:35,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162257171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:35,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:35,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:35,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732975352] [2021-05-22 01:56:35,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:35,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:35,430 INFO L87 Difference]: Start difference. First operand 1278 states and 5001 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:35,498 INFO L93 Difference]: Finished difference Result 2545 states and 9297 transitions. [2021-05-22 01:56:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:35,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:35,503 INFO L225 Difference]: With dead ends: 2545 [2021-05-22 01:56:35,503 INFO L226 Difference]: Without dead ends: 2386 [2021-05-22 01:56:35,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-05-22 01:56:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1294. [2021-05-22 01:56:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9048723897911835) internal successors, (5049), 1293 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5049 transitions. [2021-05-22 01:56:35,532 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5049 transitions. Word has length 25 [2021-05-22 01:56:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:35,532 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5049 transitions. [2021-05-22 01:56:35,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5049 transitions. [2021-05-22 01:56:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:35,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:35,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:35,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2021-05-22 01:56:35,534 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1738868639, now seen corresponding path program 436 times [2021-05-22 01:56:35,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:35,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540197583] [2021-05-22 01:56:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:35,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540197583] [2021-05-22 01:56:35,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540197583] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:35,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:35,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:35,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841827434] [2021-05-22 01:56:35,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:35,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:35,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:35,609 INFO L87 Difference]: Start difference. First operand 1294 states and 5049 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:35,673 INFO L93 Difference]: Finished difference Result 2569 states and 9373 transitions. [2021-05-22 01:56:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:35,677 INFO L225 Difference]: With dead ends: 2569 [2021-05-22 01:56:35,677 INFO L226 Difference]: Without dead ends: 2370 [2021-05-22 01:56:35,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-05-22 01:56:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1278. [2021-05-22 01:56:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.9099451840250588) internal successors, (4993), 1277 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4993 transitions. [2021-05-22 01:56:35,706 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4993 transitions. Word has length 25 [2021-05-22 01:56:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:35,706 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4993 transitions. [2021-05-22 01:56:35,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4993 transitions. [2021-05-22 01:56:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:35,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:35,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:35,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2021-05-22 01:56:35,707 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 195653729, now seen corresponding path program 437 times [2021-05-22 01:56:35,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:35,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285839846] [2021-05-22 01:56:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:35,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285839846] [2021-05-22 01:56:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285839846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:35,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:35,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:35,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770515673] [2021-05-22 01:56:35,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:35,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:35,787 INFO L87 Difference]: Start difference. First operand 1278 states and 4993 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:35,850 INFO L93 Difference]: Finished difference Result 2613 states and 9549 transitions. [2021-05-22 01:56:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:35,855 INFO L225 Difference]: With dead ends: 2613 [2021-05-22 01:56:35,855 INFO L226 Difference]: Without dead ends: 2426 [2021-05-22 01:56:35,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-05-22 01:56:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1306. [2021-05-22 01:56:35,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.893486590038314) internal successors, (5081), 1305 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5081 transitions. [2021-05-22 01:56:35,884 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5081 transitions. Word has length 25 [2021-05-22 01:56:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:35,884 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5081 transitions. [2021-05-22 01:56:35,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5081 transitions. [2021-05-22 01:56:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:35,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:35,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:35,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2021-05-22 01:56:35,886 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1847683265, now seen corresponding path program 438 times [2021-05-22 01:56:35,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:35,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784194013] [2021-05-22 01:56:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:35,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784194013] [2021-05-22 01:56:35,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784194013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:35,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:35,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743254294] [2021-05-22 01:56:35,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:35,961 INFO L87 Difference]: Start difference. First operand 1306 states and 5081 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:36,028 INFO L93 Difference]: Finished difference Result 2609 states and 9509 transitions. [2021-05-22 01:56:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:36,033 INFO L225 Difference]: With dead ends: 2609 [2021-05-22 01:56:36,033 INFO L226 Difference]: Without dead ends: 2390 [2021-05-22 01:56:36,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-05-22 01:56:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1270. [2021-05-22 01:56:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.9156816390858946) internal successors, (4969), 1269 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4969 transitions. [2021-05-22 01:56:36,062 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4969 transitions. Word has length 25 [2021-05-22 01:56:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:36,062 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4969 transitions. [2021-05-22 01:56:36,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4969 transitions. [2021-05-22 01:56:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:36,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:36,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:36,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2021-05-22 01:56:36,063 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:36,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1409693759, now seen corresponding path program 439 times [2021-05-22 01:56:36,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:36,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096075107] [2021-05-22 01:56:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:36,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:36,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096075107] [2021-05-22 01:56:36,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096075107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:36,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:36,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047621087] [2021-05-22 01:56:36,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:36,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:36,148 INFO L87 Difference]: Start difference. First operand 1270 states and 4969 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:36,205 INFO L93 Difference]: Finished difference Result 2513 states and 9169 transitions. [2021-05-22 01:56:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:36,210 INFO L225 Difference]: With dead ends: 2513 [2021-05-22 01:56:36,210 INFO L226 Difference]: Without dead ends: 2354 [2021-05-22 01:56:36,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-05-22 01:56:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1294. [2021-05-22 01:56:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.907965970610982) internal successors, (5053), 1293 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5053 transitions. [2021-05-22 01:56:36,239 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5053 transitions. Word has length 25 [2021-05-22 01:56:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:36,239 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5053 transitions. [2021-05-22 01:56:36,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5053 transitions. [2021-05-22 01:56:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:36,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:36,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:36,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2021-05-22 01:56:36,240 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1876975553, now seen corresponding path program 440 times [2021-05-22 01:56:36,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:36,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569952687] [2021-05-22 01:56:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:36,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:36,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569952687] [2021-05-22 01:56:36,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569952687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:36,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:36,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:36,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658005794] [2021-05-22 01:56:36,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:36,337 INFO L87 Difference]: Start difference. First operand 1294 states and 5053 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:36,400 INFO L93 Difference]: Finished difference Result 2541 states and 9257 transitions. [2021-05-22 01:56:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:36,404 INFO L225 Difference]: With dead ends: 2541 [2021-05-22 01:56:36,404 INFO L226 Difference]: Without dead ends: 2338 [2021-05-22 01:56:36,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-05-22 01:56:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1278. [2021-05-22 01:56:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.913077525450274) internal successors, (4997), 1277 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4997 transitions. [2021-05-22 01:56:36,433 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4997 transitions. Word has length 25 [2021-05-22 01:56:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:36,433 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4997 transitions. [2021-05-22 01:56:36,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4997 transitions. [2021-05-22 01:56:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:36,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:36,434 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:36,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2021-05-22 01:56:36,434 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 613666879, now seen corresponding path program 441 times [2021-05-22 01:56:36,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:36,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715286436] [2021-05-22 01:56:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:36,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:36,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715286436] [2021-05-22 01:56:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715286436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:36,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:36,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844070599] [2021-05-22 01:56:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:36,511 INFO L87 Difference]: Start difference. First operand 1278 states and 4997 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:36,558 INFO L93 Difference]: Finished difference Result 2469 states and 9009 transitions. [2021-05-22 01:56:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:36,562 INFO L225 Difference]: With dead ends: 2469 [2021-05-22 01:56:36,563 INFO L226 Difference]: Without dead ends: 2310 [2021-05-22 01:56:36,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-22 01:56:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1294. [2021-05-22 01:56:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9017788089713843) internal successors, (5045), 1293 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5045 transitions. [2021-05-22 01:56:36,593 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5045 transitions. Word has length 25 [2021-05-22 01:56:36,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:36,593 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5045 transitions. [2021-05-22 01:56:36,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5045 transitions. [2021-05-22 01:56:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:36,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:36,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:36,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2021-05-22 01:56:36,595 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash -31864735, now seen corresponding path program 442 times [2021-05-22 01:56:36,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:36,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946309903] [2021-05-22 01:56:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:36,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:36,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946309903] [2021-05-22 01:56:36,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946309903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:36,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:36,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:36,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648726694] [2021-05-22 01:56:36,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:36,671 INFO L87 Difference]: Start difference. First operand 1294 states and 5045 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:36,731 INFO L93 Difference]: Finished difference Result 2357 states and 8672 transitions. [2021-05-22 01:56:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:36,736 INFO L225 Difference]: With dead ends: 2357 [2021-05-22 01:56:36,736 INFO L226 Difference]: Without dead ends: 2166 [2021-05-22 01:56:36,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-05-22 01:56:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1278. [2021-05-22 01:56:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.906812842599843) internal successors, (4989), 1277 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4989 transitions. [2021-05-22 01:56:36,764 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4989 transitions. Word has length 25 [2021-05-22 01:56:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:36,764 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4989 transitions. [2021-05-22 01:56:36,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4989 transitions. [2021-05-22 01:56:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:36,766 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:36,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:36,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2021-05-22 01:56:36,766 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1230458977, now seen corresponding path program 443 times [2021-05-22 01:56:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:36,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880487963] [2021-05-22 01:56:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:36,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:36,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880487963] [2021-05-22 01:56:36,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880487963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:36,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:36,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865400097] [2021-05-22 01:56:36,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:36,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:36,839 INFO L87 Difference]: Start difference. First operand 1278 states and 4989 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:36,897 INFO L93 Difference]: Finished difference Result 2505 states and 9141 transitions. [2021-05-22 01:56:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:36,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:36,902 INFO L225 Difference]: With dead ends: 2505 [2021-05-22 01:56:36,902 INFO L226 Difference]: Without dead ends: 2318 [2021-05-22 01:56:36,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-05-22 01:56:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1302. [2021-05-22 01:56:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.8931591083781707) internal successors, (5065), 1301 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 5065 transitions. [2021-05-22 01:56:36,930 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 5065 transitions. Word has length 25 [2021-05-22 01:56:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:36,930 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 5065 transitions. [2021-05-22 01:56:36,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 5065 transitions. [2021-05-22 01:56:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:36,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:36,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:36,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2021-05-22 01:56:36,933 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -161685569, now seen corresponding path program 444 times [2021-05-22 01:56:36,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:36,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718130624] [2021-05-22 01:56:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:37,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718130624] [2021-05-22 01:56:37,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718130624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:37,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:37,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:37,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426927646] [2021-05-22 01:56:37,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:37,011 INFO L87 Difference]: Start difference. First operand 1302 states and 5065 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:37,073 INFO L93 Difference]: Finished difference Result 2365 states and 8692 transitions. [2021-05-22 01:56:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:37,077 INFO L225 Difference]: With dead ends: 2365 [2021-05-22 01:56:37,077 INFO L226 Difference]: Without dead ends: 2158 [2021-05-22 01:56:37,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-05-22 01:56:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1270. [2021-05-22 01:56:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.9125295508274234) internal successors, (4965), 1269 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4965 transitions. [2021-05-22 01:56:37,105 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4965 transitions. Word has length 25 [2021-05-22 01:56:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:37,105 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4965 transitions. [2021-05-22 01:56:37,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4965 transitions. [2021-05-22 01:56:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:37,106 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:37,107 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:37,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2021-05-22 01:56:37,107 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash 552945693, now seen corresponding path program 445 times [2021-05-22 01:56:37,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:37,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404836091] [2021-05-22 01:56:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:37,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404836091] [2021-05-22 01:56:37,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404836091] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:37,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:37,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470814644] [2021-05-22 01:56:37,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:37,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:37,183 INFO L87 Difference]: Start difference. First operand 1270 states and 4965 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:37,228 INFO L93 Difference]: Finished difference Result 2449 states and 8929 transitions. [2021-05-22 01:56:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:37,233 INFO L225 Difference]: With dead ends: 2449 [2021-05-22 01:56:37,233 INFO L226 Difference]: Without dead ends: 2290 [2021-05-22 01:56:37,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-05-22 01:56:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1294. [2021-05-22 01:56:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9048723897911835) internal successors, (5049), 1293 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5049 transitions. [2021-05-22 01:56:37,261 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5049 transitions. Word has length 25 [2021-05-22 01:56:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:37,262 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5049 transitions. [2021-05-22 01:56:37,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5049 transitions. [2021-05-22 01:56:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:37,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:37,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:37,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2021-05-22 01:56:37,263 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash 523086015, now seen corresponding path program 446 times [2021-05-22 01:56:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:37,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414224385] [2021-05-22 01:56:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:37,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:37,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414224385] [2021-05-22 01:56:37,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414224385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:37,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:37,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:37,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808124368] [2021-05-22 01:56:37,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:37,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:37,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:37,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:37,339 INFO L87 Difference]: Start difference. First operand 1294 states and 5049 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:37,397 INFO L93 Difference]: Finished difference Result 2473 states and 9005 transitions. [2021-05-22 01:56:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:37,401 INFO L225 Difference]: With dead ends: 2473 [2021-05-22 01:56:37,402 INFO L226 Difference]: Without dead ends: 2274 [2021-05-22 01:56:37,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-05-22 01:56:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1278. [2021-05-22 01:56:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.9099451840250588) internal successors, (4993), 1277 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4993 transitions. [2021-05-22 01:56:37,430 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4993 transitions. Word has length 25 [2021-05-22 01:56:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:37,430 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4993 transitions. [2021-05-22 01:56:37,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4993 transitions. [2021-05-22 01:56:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:37,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:37,431 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:37,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2021-05-22 01:56:37,432 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:37,432 INFO L82 PathProgramCache]: Analyzing trace with hash 72043647, now seen corresponding path program 447 times [2021-05-22 01:56:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:37,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251200663] [2021-05-22 01:56:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:37,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:37,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251200663] [2021-05-22 01:56:37,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251200663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:37,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:37,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:37,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466586553] [2021-05-22 01:56:37,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:37,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:37,509 INFO L87 Difference]: Start difference. First operand 1278 states and 4993 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:37,556 INFO L93 Difference]: Finished difference Result 2393 states and 8717 transitions. [2021-05-22 01:56:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:37,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:37,560 INFO L225 Difference]: With dead ends: 2393 [2021-05-22 01:56:37,560 INFO L226 Difference]: Without dead ends: 2234 [2021-05-22 01:56:37,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-05-22 01:56:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1294. [2021-05-22 01:56:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.8986852281515856) internal successors, (5041), 1293 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5041 transitions. [2021-05-22 01:56:37,588 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5041 transitions. Word has length 25 [2021-05-22 01:56:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:37,588 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 5041 transitions. [2021-05-22 01:56:37,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5041 transitions. [2021-05-22 01:56:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:37,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:37,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:37,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451 [2021-05-22 01:56:37,590 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2054926273, now seen corresponding path program 448 times [2021-05-22 01:56:37,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:37,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591153671] [2021-05-22 01:56:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:37,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591153671] [2021-05-22 01:56:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591153671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:37,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:37,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250996438] [2021-05-22 01:56:37,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:37,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:37,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:37,667 INFO L87 Difference]: Start difference. First operand 1294 states and 5041 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:37,730 INFO L93 Difference]: Finished difference Result 2281 states and 8380 transitions. [2021-05-22 01:56:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:37,734 INFO L225 Difference]: With dead ends: 2281 [2021-05-22 01:56:37,734 INFO L226 Difference]: Without dead ends: 2090 [2021-05-22 01:56:37,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-05-22 01:56:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1278. [2021-05-22 01:56:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.903680501174628) internal successors, (4985), 1277 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4985 transitions. [2021-05-22 01:56:37,761 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4985 transitions. Word has length 25 [2021-05-22 01:56:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4985 transitions. [2021-05-22 01:56:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4985 transitions. [2021-05-22 01:56:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:37,763 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:37,763 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:37,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2021-05-22 01:56:37,763 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:37,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1357504415, now seen corresponding path program 449 times [2021-05-22 01:56:37,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:37,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208821504] [2021-05-22 01:56:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:37,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:37,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208821504] [2021-05-22 01:56:37,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208821504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:37,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:37,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:37,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28620748] [2021-05-22 01:56:37,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:37,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:37,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:37,839 INFO L87 Difference]: Start difference. First operand 1278 states and 4985 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:37,902 INFO L93 Difference]: Finished difference Result 2297 states and 8452 transitions. [2021-05-22 01:56:37,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:37,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:37,907 INFO L225 Difference]: With dead ends: 2297 [2021-05-22 01:56:37,907 INFO L226 Difference]: Without dead ends: 2114 [2021-05-22 01:56:37,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-05-22 01:56:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1302. [2021-05-22 01:56:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.890084550345888) internal successors, (5061), 1301 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 5061 transitions. [2021-05-22 01:56:37,934 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 5061 transitions. Word has length 25 [2021-05-22 01:56:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:37,934 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 5061 transitions. [2021-05-22 01:56:37,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 5061 transitions. [2021-05-22 01:56:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:37,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:37,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:37,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2021-05-22 01:56:37,936 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:37,936 INFO L82 PathProgramCache]: Analyzing trace with hash 894125887, now seen corresponding path program 450 times [2021-05-22 01:56:37,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:37,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214353686] [2021-05-22 01:56:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:38,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:38,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214353686] [2021-05-22 01:56:38,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214353686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:38,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:38,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:38,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762420376] [2021-05-22 01:56:38,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:38,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:38,043 INFO L87 Difference]: Start difference. First operand 1302 states and 5061 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:38,115 INFO L93 Difference]: Finished difference Result 2113 states and 7839 transitions. [2021-05-22 01:56:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:38,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:38,120 INFO L225 Difference]: With dead ends: 2113 [2021-05-22 01:56:38,120 INFO L226 Difference]: Without dead ends: 1906 [2021-05-22 01:56:38,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-05-22 01:56:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1270. [2021-05-22 01:56:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.909377462568952) internal successors, (4961), 1269 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4961 transitions. [2021-05-22 01:56:38,159 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4961 transitions. Word has length 25 [2021-05-22 01:56:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:38,159 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4961 transitions. [2021-05-22 01:56:38,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4961 transitions. [2021-05-22 01:56:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:38,161 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:38,161 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:38,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2021-05-22 01:56:38,161 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:38,162 INFO L82 PathProgramCache]: Analyzing trace with hash -117393311, now seen corresponding path program 451 times [2021-05-22 01:56:38,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:38,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295546952] [2021-05-22 01:56:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:38,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:38,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295546952] [2021-05-22 01:56:38,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295546952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:38,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:38,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:38,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328662416] [2021-05-22 01:56:38,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:38,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:38,256 INFO L87 Difference]: Start difference. First operand 1270 states and 4961 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:38,326 INFO L93 Difference]: Finished difference Result 2345 states and 8652 transitions. [2021-05-22 01:56:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:38,330 INFO L225 Difference]: With dead ends: 2345 [2021-05-22 01:56:38,331 INFO L226 Difference]: Without dead ends: 2158 [2021-05-22 01:56:38,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-05-22 01:56:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1310. [2021-05-22 01:56:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.8999236058059585) internal successors, (5105), 1309 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 5105 transitions. [2021-05-22 01:56:38,358 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 5105 transitions. Word has length 25 [2021-05-22 01:56:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:38,358 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 5105 transitions. [2021-05-22 01:56:38,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 5105 transitions. [2021-05-22 01:56:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:38,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:38,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:38,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2021-05-22 01:56:38,360 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2134236991, now seen corresponding path program 452 times [2021-05-22 01:56:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:38,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319873422] [2021-05-22 01:56:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:38,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319873422] [2021-05-22 01:56:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319873422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:38,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:38,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:38,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316649388] [2021-05-22 01:56:38,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:38,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:38,436 INFO L87 Difference]: Start difference. First operand 1310 states and 5105 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:38,499 INFO L93 Difference]: Finished difference Result 2341 states and 8612 transitions. [2021-05-22 01:56:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:38,503 INFO L225 Difference]: With dead ends: 2341 [2021-05-22 01:56:38,504 INFO L226 Difference]: Without dead ends: 2130 [2021-05-22 01:56:38,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-05-22 01:56:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1282. [2021-05-22 01:56:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.907103825136612) internal successors, (5005), 1281 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 5005 transitions. [2021-05-22 01:56:38,530 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 5005 transitions. Word has length 25 [2021-05-22 01:56:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:38,530 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 5005 transitions. [2021-05-22 01:56:38,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 5005 transitions. [2021-05-22 01:56:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:38,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:38,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:38,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456 [2021-05-22 01:56:38,532 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash -964190273, now seen corresponding path program 453 times [2021-05-22 01:56:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:38,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558511727] [2021-05-22 01:56:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:38,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:38,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558511727] [2021-05-22 01:56:38,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558511727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:38,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:38,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:38,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135126645] [2021-05-22 01:56:38,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:38,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:38,606 INFO L87 Difference]: Start difference. First operand 1282 states and 5005 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:38,664 INFO L93 Difference]: Finished difference Result 2257 states and 8308 transitions. [2021-05-22 01:56:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:38,668 INFO L225 Difference]: With dead ends: 2257 [2021-05-22 01:56:38,668 INFO L226 Difference]: Without dead ends: 2070 [2021-05-22 01:56:38,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-05-22 01:56:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1306. [2021-05-22 01:56:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.893486590038314) internal successors, (5081), 1305 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5081 transitions. [2021-05-22 01:56:38,696 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5081 transitions. Word has length 25 [2021-05-22 01:56:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:38,696 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5081 transitions. [2021-05-22 01:56:38,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5081 transitions. [2021-05-22 01:56:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:38,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:38,698 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:38,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457 [2021-05-22 01:56:38,698 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash 228276159, now seen corresponding path program 454 times [2021-05-22 01:56:38,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:38,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614112241] [2021-05-22 01:56:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:38,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614112241] [2021-05-22 01:56:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614112241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413608847] [2021-05-22 01:56:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:38,772 INFO L87 Difference]: Start difference. First operand 1306 states and 5081 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:38,831 INFO L93 Difference]: Finished difference Result 2117 states and 7859 transitions. [2021-05-22 01:56:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:38,834 INFO L225 Difference]: With dead ends: 2117 [2021-05-22 01:56:38,835 INFO L226 Difference]: Without dead ends: 1918 [2021-05-22 01:56:38,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-05-22 01:56:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1282. [2021-05-22 01:56:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.897736143637783) internal successors, (4993), 1281 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4993 transitions. [2021-05-22 01:56:38,860 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4993 transitions. Word has length 25 [2021-05-22 01:56:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:38,860 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4993 transitions. [2021-05-22 01:56:38,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4993 transitions. [2021-05-22 01:56:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:38,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:38,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:38,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2021-05-22 01:56:38,862 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:38,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:38,862 INFO L82 PathProgramCache]: Analyzing trace with hash 18157341, now seen corresponding path program 455 times [2021-05-22 01:56:38,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:38,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361941071] [2021-05-22 01:56:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:38,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:38,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361941071] [2021-05-22 01:56:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361941071] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:38,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:38,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:38,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569095919] [2021-05-22 01:56:38,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:38,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:38,937 INFO L87 Difference]: Start difference. First operand 1282 states and 4993 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:38,994 INFO L93 Difference]: Finished difference Result 2045 states and 7595 transitions. [2021-05-22 01:56:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:38,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:38,998 INFO L225 Difference]: With dead ends: 2045 [2021-05-22 01:56:38,998 INFO L226 Difference]: Without dead ends: 1862 [2021-05-22 01:56:38,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-05-22 01:56:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1306. [2021-05-22 01:56:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8842911877394637) internal successors, (5069), 1305 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5069 transitions. [2021-05-22 01:56:39,025 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5069 transitions. Word has length 25 [2021-05-22 01:56:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:39,025 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5069 transitions. [2021-05-22 01:56:39,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5069 transitions. [2021-05-22 01:56:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:39,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:39,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:39,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459 [2021-05-22 01:56:39,027 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:39,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1099219967, now seen corresponding path program 456 times [2021-05-22 01:56:39,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:39,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691953636] [2021-05-22 01:56:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:39,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691953636] [2021-05-22 01:56:39,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691953636] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:39,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:39,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:39,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119851928] [2021-05-22 01:56:39,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:39,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:39,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:39,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:39,102 INFO L87 Difference]: Start difference. First operand 1306 states and 5069 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:39,157 INFO L93 Difference]: Finished difference Result 1861 states and 6982 transitions. [2021-05-22 01:56:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:39,161 INFO L225 Difference]: With dead ends: 1861 [2021-05-22 01:56:39,161 INFO L226 Difference]: Without dead ends: 1646 [2021-05-22 01:56:39,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-05-22 01:56:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1266. [2021-05-22 01:56:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.9138339920948617) internal successors, (4951), 1265 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4951 transitions. [2021-05-22 01:56:39,185 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4951 transitions. Word has length 25 [2021-05-22 01:56:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:39,185 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4951 transitions. [2021-05-22 01:56:39,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4951 transitions. [2021-05-22 01:56:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:39,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:39,187 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:39,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460 [2021-05-22 01:56:39,187 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1804947553, now seen corresponding path program 457 times [2021-05-22 01:56:39,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:39,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582605816] [2021-05-22 01:56:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:39,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:39,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582605816] [2021-05-22 01:56:39,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582605816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:39,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:39,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:39,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852206023] [2021-05-22 01:56:39,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:39,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:39,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:39,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:39,261 INFO L87 Difference]: Start difference. First operand 1266 states and 4951 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:39,320 INFO L93 Difference]: Finished difference Result 2910 states and 10765 transitions. [2021-05-22 01:56:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:39,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:39,325 INFO L225 Difference]: With dead ends: 2910 [2021-05-22 01:56:39,325 INFO L226 Difference]: Without dead ends: 2723 [2021-05-22 01:56:39,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-05-22 01:56:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1316. [2021-05-22 01:56:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.9133079847908747) internal successors, (5146), 1315 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 5146 transitions. [2021-05-22 01:56:39,357 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 5146 transitions. Word has length 25 [2021-05-22 01:56:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:39,357 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 5146 transitions. [2021-05-22 01:56:39,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 5146 transitions. [2021-05-22 01:56:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:39,359 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:39,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:39,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461 [2021-05-22 01:56:39,359 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:39,359 INFO L82 PathProgramCache]: Analyzing trace with hash -238389441, now seen corresponding path program 458 times [2021-05-22 01:56:39,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:39,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172715830] [2021-05-22 01:56:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:39,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:39,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172715830] [2021-05-22 01:56:39,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172715830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:39,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:39,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:39,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792804871] [2021-05-22 01:56:39,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:39,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:39,435 INFO L87 Difference]: Start difference. First operand 1316 states and 5146 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:39,494 INFO L93 Difference]: Finished difference Result 2906 states and 10725 transitions. [2021-05-22 01:56:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:39,499 INFO L225 Difference]: With dead ends: 2906 [2021-05-22 01:56:39,499 INFO L226 Difference]: Without dead ends: 2695 [2021-05-22 01:56:39,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-05-22 01:56:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1288. [2021-05-22 01:56:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.9207459207459205) internal successors, (5046), 1287 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 5046 transitions. [2021-05-22 01:56:39,529 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 5046 transitions. Word has length 25 [2021-05-22 01:56:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:39,529 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 5046 transitions. [2021-05-22 01:56:39,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 5046 transitions. [2021-05-22 01:56:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:39,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:39,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:39,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462 [2021-05-22 01:56:39,531 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash 958150591, now seen corresponding path program 459 times [2021-05-22 01:56:39,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:39,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053534539] [2021-05-22 01:56:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:39,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:39,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053534539] [2021-05-22 01:56:39,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053534539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:39,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:39,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:39,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034884478] [2021-05-22 01:56:39,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:39,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:39,605 INFO L87 Difference]: Start difference. First operand 1288 states and 5046 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:39,663 INFO L93 Difference]: Finished difference Result 2898 states and 10709 transitions. [2021-05-22 01:56:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:39,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:39,669 INFO L225 Difference]: With dead ends: 2898 [2021-05-22 01:56:39,669 INFO L226 Difference]: Without dead ends: 2711 [2021-05-22 01:56:39,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-05-22 01:56:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1312. [2021-05-22 01:56:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.906941266209001) internal successors, (5122), 1311 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 5122 transitions. [2021-05-22 01:56:39,700 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 5122 transitions. Word has length 25 [2021-05-22 01:56:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:39,700 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 5122 transitions. [2021-05-22 01:56:39,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 5122 transitions. [2021-05-22 01:56:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:39,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:39,702 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:39,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463 [2021-05-22 01:56:39,702 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2144350273, now seen corresponding path program 460 times [2021-05-22 01:56:39,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:39,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087394146] [2021-05-22 01:56:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:39,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087394146] [2021-05-22 01:56:39,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087394146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:39,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:39,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:39,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882190836] [2021-05-22 01:56:39,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:39,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:39,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:39,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:39,778 INFO L87 Difference]: Start difference. First operand 1312 states and 5122 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:39,838 INFO L93 Difference]: Finished difference Result 2886 states and 10645 transitions. [2021-05-22 01:56:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:39,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:39,843 INFO L225 Difference]: With dead ends: 2886 [2021-05-22 01:56:39,843 INFO L226 Difference]: Without dead ends: 2687 [2021-05-22 01:56:39,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-05-22 01:56:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-05-22 01:56:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.9114219114219115) internal successors, (5034), 1287 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 5034 transitions. [2021-05-22 01:56:39,874 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 5034 transitions. Word has length 25 [2021-05-22 01:56:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:39,874 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 5034 transitions. [2021-05-22 01:56:39,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 5034 transitions. [2021-05-22 01:56:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:39,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:39,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:39,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464 [2021-05-22 01:56:39,876 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1940498205, now seen corresponding path program 461 times [2021-05-22 01:56:39,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:39,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313465387] [2021-05-22 01:56:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:39,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313465387] [2021-05-22 01:56:39,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313465387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:39,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:39,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061221713] [2021-05-22 01:56:39,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:39,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:39,951 INFO L87 Difference]: Start difference. First operand 1288 states and 5034 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:40,008 INFO L93 Difference]: Finished difference Result 2890 states and 10673 transitions. [2021-05-22 01:56:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:40,013 INFO L225 Difference]: With dead ends: 2890 [2021-05-22 01:56:40,013 INFO L226 Difference]: Without dead ends: 2707 [2021-05-22 01:56:40,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2021-05-22 01:56:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 1312. [2021-05-22 01:56:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.8977879481311977) internal successors, (5110), 1311 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 5110 transitions. [2021-05-22 01:56:40,044 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 5110 transitions. Word has length 25 [2021-05-22 01:56:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:40,044 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 5110 transitions. [2021-05-22 01:56:40,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 5110 transitions. [2021-05-22 01:56:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:40,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:40,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:40,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465 [2021-05-22 01:56:40,045 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1273406465, now seen corresponding path program 462 times [2021-05-22 01:56:40,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:40,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919679760] [2021-05-22 01:56:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:40,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:40,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919679760] [2021-05-22 01:56:40,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919679760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:40,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:40,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:40,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965507026] [2021-05-22 01:56:40,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:40,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:40,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:40,122 INFO L87 Difference]: Start difference. First operand 1312 states and 5110 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:40,182 INFO L93 Difference]: Finished difference Result 2882 states and 10621 transitions. [2021-05-22 01:56:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:40,187 INFO L225 Difference]: With dead ends: 2882 [2021-05-22 01:56:40,187 INFO L226 Difference]: Without dead ends: 2671 [2021-05-22 01:56:40,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-05-22 01:56:40,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1276. [2021-05-22 01:56:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.9184313725490196) internal successors, (4996), 1275 states have internal predecessors, (4996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4996 transitions. [2021-05-22 01:56:40,218 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4996 transitions. Word has length 25 [2021-05-22 01:56:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:40,218 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4996 transitions. [2021-05-22 01:56:40,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4996 transitions. [2021-05-22 01:56:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:40,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:40,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:40,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable466 [2021-05-22 01:56:40,220 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash -158407361, now seen corresponding path program 463 times [2021-05-22 01:56:40,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:40,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578239913] [2021-05-22 01:56:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:40,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:40,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578239913] [2021-05-22 01:56:40,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578239913] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:40,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:40,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:40,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232063872] [2021-05-22 01:56:40,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:40,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:40,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:40,295 INFO L87 Difference]: Start difference. First operand 1276 states and 4996 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:40,361 INFO L93 Difference]: Finished difference Result 2802 states and 10327 transitions. [2021-05-22 01:56:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:40,366 INFO L225 Difference]: With dead ends: 2802 [2021-05-22 01:56:40,366 INFO L226 Difference]: Without dead ends: 2615 [2021-05-22 01:56:40,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-05-22 01:56:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 1326. [2021-05-22 01:56:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.913207547169811) internal successors, (5185), 1325 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 5185 transitions. [2021-05-22 01:56:40,396 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 5185 transitions. Word has length 25 [2021-05-22 01:56:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:40,396 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 5185 transitions. [2021-05-22 01:56:40,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 5185 transitions. [2021-05-22 01:56:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:40,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:40,398 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:40,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467 [2021-05-22 01:56:40,398 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2093222941, now seen corresponding path program 464 times [2021-05-22 01:56:40,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:40,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945782193] [2021-05-22 01:56:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:40,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:40,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945782193] [2021-05-22 01:56:40,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945782193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:40,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:40,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:40,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966523771] [2021-05-22 01:56:40,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:40,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:40,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:40,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:40,503 INFO L87 Difference]: Start difference. First operand 1326 states and 5185 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:40,562 INFO L93 Difference]: Finished difference Result 2798 states and 10287 transitions. [2021-05-22 01:56:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:40,567 INFO L225 Difference]: With dead ends: 2798 [2021-05-22 01:56:40,567 INFO L226 Difference]: Without dead ends: 2587 [2021-05-22 01:56:40,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-05-22 01:56:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1298. [2021-05-22 01:56:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.9190439475713186) internal successors, (5083), 1297 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 5083 transitions. [2021-05-22 01:56:40,607 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 5083 transitions. Word has length 25 [2021-05-22 01:56:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:40,607 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 5083 transitions. [2021-05-22 01:56:40,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 5083 transitions. [2021-05-22 01:56:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:40,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:40,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:40,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468 [2021-05-22 01:56:40,609 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2065294017, now seen corresponding path program 465 times [2021-05-22 01:56:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:40,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433156785] [2021-05-22 01:56:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:40,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433156785] [2021-05-22 01:56:40,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433156785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:40,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:40,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:40,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671278534] [2021-05-22 01:56:40,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:40,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:40,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:40,683 INFO L87 Difference]: Start difference. First operand 1298 states and 5083 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:40,741 INFO L93 Difference]: Finished difference Result 2859 states and 10515 transitions. [2021-05-22 01:56:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:40,746 INFO L225 Difference]: With dead ends: 2859 [2021-05-22 01:56:40,746 INFO L226 Difference]: Without dead ends: 2672 [2021-05-22 01:56:40,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-22 01:56:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1344. [2021-05-22 01:56:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.9017125837676843) internal successors, (5240), 1343 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 5240 transitions. [2021-05-22 01:56:40,777 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 5240 transitions. Word has length 25 [2021-05-22 01:56:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:40,777 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 5240 transitions. [2021-05-22 01:56:40,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 5240 transitions. [2021-05-22 01:56:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:40,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:40,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:40,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469 [2021-05-22 01:56:40,779 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1984404161, now seen corresponding path program 466 times [2021-05-22 01:56:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:40,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311022344] [2021-05-22 01:56:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:40,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:40,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311022344] [2021-05-22 01:56:40,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311022344] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:40,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:40,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321379050] [2021-05-22 01:56:40,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:40,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:40,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:40,854 INFO L87 Difference]: Start difference. First operand 1344 states and 5240 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:40,900 INFO L93 Difference]: Finished difference Result 2894 states and 10604 transitions. [2021-05-22 01:56:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:40,905 INFO L225 Difference]: With dead ends: 2894 [2021-05-22 01:56:40,906 INFO L226 Difference]: Without dead ends: 2626 [2021-05-22 01:56:40,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-22 01:56:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1298. [2021-05-22 01:56:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.902081727062452) internal successors, (5061), 1297 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 5061 transitions. [2021-05-22 01:56:40,935 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 5061 transitions. Word has length 25 [2021-05-22 01:56:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 5061 transitions. [2021-05-22 01:56:40,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 5061 transitions. [2021-05-22 01:56:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:40,937 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:40,937 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:40,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470 [2021-05-22 01:56:40,937 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1082946403, now seen corresponding path program 467 times [2021-05-22 01:56:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:40,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789921399] [2021-05-22 01:56:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:41,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789921399] [2021-05-22 01:56:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789921399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:41,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:41,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173693977] [2021-05-22 01:56:41,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:41,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:41,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:41,021 INFO L87 Difference]: Start difference. First operand 1298 states and 5061 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:41,078 INFO L93 Difference]: Finished difference Result 2849 states and 10462 transitions. [2021-05-22 01:56:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:41,084 INFO L225 Difference]: With dead ends: 2849 [2021-05-22 01:56:41,084 INFO L226 Difference]: Without dead ends: 2666 [2021-05-22 01:56:41,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-05-22 01:56:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1342. [2021-05-22 01:56:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.8873974645786724) internal successors, (5213), 1341 states have internal predecessors, (5213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 5213 transitions. [2021-05-22 01:56:41,115 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 5213 transitions. Word has length 25 [2021-05-22 01:56:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:41,115 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 5213 transitions. [2021-05-22 01:56:41,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 5213 transitions. [2021-05-22 01:56:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:41,117 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:41,117 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:41,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471 [2021-05-22 01:56:41,117 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2142501887, now seen corresponding path program 468 times [2021-05-22 01:56:41,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:41,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70292197] [2021-05-22 01:56:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:41,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:41,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70292197] [2021-05-22 01:56:41,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70292197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:41,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:41,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:41,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669347760] [2021-05-22 01:56:41,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:41,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:41,208 INFO L87 Difference]: Start difference. First operand 1342 states and 5213 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:41,256 INFO L93 Difference]: Finished difference Result 2888 states and 10565 transitions. [2021-05-22 01:56:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:41,261 INFO L225 Difference]: With dead ends: 2888 [2021-05-22 01:56:41,261 INFO L226 Difference]: Without dead ends: 2600 [2021-05-22 01:56:41,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-05-22 01:56:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1276. [2021-05-22 01:56:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.9105882352941177) internal successors, (4986), 1275 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4986 transitions. [2021-05-22 01:56:41,291 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4986 transitions. Word has length 25 [2021-05-22 01:56:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:41,291 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4986 transitions. [2021-05-22 01:56:41,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4986 transitions. [2021-05-22 01:56:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:41,292 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:41,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:41,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472 [2021-05-22 01:56:41,293 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1015155427, now seen corresponding path program 469 times [2021-05-22 01:56:41,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:41,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602730555] [2021-05-22 01:56:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:41,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:41,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602730555] [2021-05-22 01:56:41,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602730555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:41,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:41,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:41,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566798253] [2021-05-22 01:56:41,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:41,366 INFO L87 Difference]: Start difference. First operand 1276 states and 4986 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:41,425 INFO L93 Difference]: Finished difference Result 2756 states and 10128 transitions. [2021-05-22 01:56:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:41,430 INFO L225 Difference]: With dead ends: 2756 [2021-05-22 01:56:41,430 INFO L226 Difference]: Without dead ends: 2569 [2021-05-22 01:56:41,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-05-22 01:56:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1320. [2021-05-22 01:56:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.907505686125853) internal successors, (5154), 1319 states have internal predecessors, (5154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 5154 transitions. [2021-05-22 01:56:41,460 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 5154 transitions. Word has length 25 [2021-05-22 01:56:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:41,460 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 5154 transitions. [2021-05-22 01:56:41,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 5154 transitions. [2021-05-22 01:56:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:41,462 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:41,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:41,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473 [2021-05-22 01:56:41,462 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:41,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:41,462 INFO L82 PathProgramCache]: Analyzing trace with hash 177311005, now seen corresponding path program 470 times [2021-05-22 01:56:41,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:41,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601906051] [2021-05-22 01:56:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:41,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:41,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601906051] [2021-05-22 01:56:41,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601906051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:41,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:41,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186625196] [2021-05-22 01:56:41,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:41,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:41,535 INFO L87 Difference]: Start difference. First operand 1320 states and 5154 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:41,594 INFO L93 Difference]: Finished difference Result 2744 states and 10064 transitions. [2021-05-22 01:56:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:41,599 INFO L225 Difference]: With dead ends: 2744 [2021-05-22 01:56:41,599 INFO L226 Difference]: Without dead ends: 2545 [2021-05-22 01:56:41,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-05-22 01:56:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1296. [2021-05-22 01:56:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.911969111969112) internal successors, (5066), 1295 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 5066 transitions. [2021-05-22 01:56:41,628 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 5066 transitions. Word has length 25 [2021-05-22 01:56:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:41,629 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 5066 transitions. [2021-05-22 01:56:41,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 5066 transitions. [2021-05-22 01:56:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:41,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:41,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:41,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474 [2021-05-22 01:56:41,630 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1632678785, now seen corresponding path program 471 times [2021-05-22 01:56:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:41,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320262554] [2021-05-22 01:56:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:41,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:41,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320262554] [2021-05-22 01:56:41,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320262554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:41,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:41,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008274925] [2021-05-22 01:56:41,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:41,703 INFO L87 Difference]: Start difference. First operand 1296 states and 5066 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:41,762 INFO L93 Difference]: Finished difference Result 2779 states and 10175 transitions. [2021-05-22 01:56:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:41,767 INFO L225 Difference]: With dead ends: 2779 [2021-05-22 01:56:41,767 INFO L226 Difference]: Without dead ends: 2592 [2021-05-22 01:56:41,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-05-22 01:56:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 1342. [2021-05-22 01:56:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.894854586129754) internal successors, (5223), 1341 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 5223 transitions. [2021-05-22 01:56:41,797 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 5223 transitions. Word has length 25 [2021-05-22 01:56:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:41,797 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 5223 transitions. [2021-05-22 01:56:41,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 5223 transitions. [2021-05-22 01:56:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:41,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:41,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:41,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475 [2021-05-22 01:56:41,799 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash 287501597, now seen corresponding path program 472 times [2021-05-22 01:56:41,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:41,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339343835] [2021-05-22 01:56:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:41,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339343835] [2021-05-22 01:56:41,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339343835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:41,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:41,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:41,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011570863] [2021-05-22 01:56:41,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:41,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:41,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:41,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:41,872 INFO L87 Difference]: Start difference. First operand 1342 states and 5223 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:41,920 INFO L93 Difference]: Finished difference Result 2814 states and 10264 transitions. [2021-05-22 01:56:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:41,925 INFO L225 Difference]: With dead ends: 2814 [2021-05-22 01:56:41,925 INFO L226 Difference]: Without dead ends: 2546 [2021-05-22 01:56:41,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-05-22 01:56:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1296. [2021-05-22 01:56:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.8965250965250964) internal successors, (5046), 1295 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 5046 transitions. [2021-05-22 01:56:41,954 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 5046 transitions. Word has length 25 [2021-05-22 01:56:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:41,954 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 5046 transitions. [2021-05-22 01:56:41,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 5046 transitions. [2021-05-22 01:56:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:41,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:41,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:41,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476 [2021-05-22 01:56:41,955 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash 603051293, now seen corresponding path program 473 times [2021-05-22 01:56:41,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:41,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209217677] [2021-05-22 01:56:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:42,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209217677] [2021-05-22 01:56:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209217677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:42,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:42,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921245566] [2021-05-22 01:56:42,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:42,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:42,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:42,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:42,038 INFO L87 Difference]: Start difference. First operand 1296 states and 5046 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:42,097 INFO L93 Difference]: Finished difference Result 2749 states and 10052 transitions. [2021-05-22 01:56:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:42,101 INFO L225 Difference]: With dead ends: 2749 [2021-05-22 01:56:42,102 INFO L226 Difference]: Without dead ends: 2574 [2021-05-22 01:56:42,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-05-22 01:56:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 1336. [2021-05-22 01:56:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.884644194756554) internal successors, (5186), 1335 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 5186 transitions. [2021-05-22 01:56:42,131 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 5186 transitions. Word has length 25 [2021-05-22 01:56:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:42,131 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 5186 transitions. [2021-05-22 01:56:42,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 5186 transitions. [2021-05-22 01:56:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:42,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:42,133 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:42,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477 [2021-05-22 01:56:42,133 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash 821402879, now seen corresponding path program 474 times [2021-05-22 01:56:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:42,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846860273] [2021-05-22 01:56:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:42,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:42,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846860273] [2021-05-22 01:56:42,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846860273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:42,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:42,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:42,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867765958] [2021-05-22 01:56:42,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:42,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:42,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:42,217 INFO L87 Difference]: Start difference. First operand 1336 states and 5186 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:42,271 INFO L93 Difference]: Finished difference Result 2701 states and 9852 transitions. [2021-05-22 01:56:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:42,276 INFO L225 Difference]: With dead ends: 2701 [2021-05-22 01:56:42,276 INFO L226 Difference]: Without dead ends: 2419 [2021-05-22 01:56:42,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-05-22 01:56:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1276. [2021-05-22 01:56:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.9027450980392158) internal successors, (4976), 1275 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4976 transitions. [2021-05-22 01:56:42,304 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4976 transitions. Word has length 25 [2021-05-22 01:56:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:42,304 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4976 transitions. [2021-05-22 01:56:42,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4976 transitions. [2021-05-22 01:56:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:42,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:42,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:42,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478 [2021-05-22 01:56:42,306 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash -42758917, now seen corresponding path program 475 times [2021-05-22 01:56:42,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:42,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371052356] [2021-05-22 01:56:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:42,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:42,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371052356] [2021-05-22 01:56:42,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371052356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:42,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:42,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623959973] [2021-05-22 01:56:42,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:42,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:42,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:42,388 INFO L87 Difference]: Start difference. First operand 1276 states and 4976 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:42,445 INFO L93 Difference]: Finished difference Result 2678 states and 9803 transitions. [2021-05-22 01:56:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:42,449 INFO L225 Difference]: With dead ends: 2678 [2021-05-22 01:56:42,449 INFO L226 Difference]: Without dead ends: 2495 [2021-05-22 01:56:42,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-05-22 01:56:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1320. [2021-05-22 01:56:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.899924184988628) internal successors, (5144), 1319 states have internal predecessors, (5144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 5144 transitions. [2021-05-22 01:56:42,478 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 5144 transitions. Word has length 25 [2021-05-22 01:56:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:42,478 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 5144 transitions. [2021-05-22 01:56:42,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 5144 transitions. [2021-05-22 01:56:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:42,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:42,480 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:42,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479 [2021-05-22 01:56:42,480 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1038303709, now seen corresponding path program 476 times [2021-05-22 01:56:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:42,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973552923] [2021-05-22 01:56:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:42,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:42,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973552923] [2021-05-22 01:56:42,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973552923] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:42,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:42,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624522672] [2021-05-22 01:56:42,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:42,562 INFO L87 Difference]: Start difference. First operand 1320 states and 5144 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:42,620 INFO L93 Difference]: Finished difference Result 2670 states and 9751 transitions. [2021-05-22 01:56:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:42,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:42,624 INFO L225 Difference]: With dead ends: 2670 [2021-05-22 01:56:42,624 INFO L226 Difference]: Without dead ends: 2471 [2021-05-22 01:56:42,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-05-22 01:56:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1296. [2021-05-22 01:56:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.904247104247104) internal successors, (5056), 1295 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 5056 transitions. [2021-05-22 01:56:42,662 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 5056 transitions. Word has length 25 [2021-05-22 01:56:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:42,662 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 5056 transitions. [2021-05-22 01:56:42,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 5056 transitions. [2021-05-22 01:56:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:42,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:42,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:42,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480 [2021-05-22 01:56:42,664 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash -660282275, now seen corresponding path program 477 times [2021-05-22 01:56:42,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:42,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104520423] [2021-05-22 01:56:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:42,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:42,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104520423] [2021-05-22 01:56:42,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104520423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:42,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:42,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:42,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682136452] [2021-05-22 01:56:42,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:42,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:42,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:42,756 INFO L87 Difference]: Start difference. First operand 1296 states and 5056 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:42,812 INFO L93 Difference]: Finished difference Result 2606 states and 9515 transitions. [2021-05-22 01:56:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:42,817 INFO L225 Difference]: With dead ends: 2606 [2021-05-22 01:56:42,817 INFO L226 Difference]: Without dead ends: 2423 [2021-05-22 01:56:42,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-05-22 01:56:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1340. [2021-05-22 01:56:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.8894697535474236) internal successors, (5208), 1339 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 5208 transitions. [2021-05-22 01:56:42,846 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 5208 transitions. Word has length 25 [2021-05-22 01:56:42,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:42,846 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 5208 transitions. [2021-05-22 01:56:42,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 5208 transitions. [2021-05-22 01:56:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:42,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:42,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:42,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481 [2021-05-22 01:56:42,848 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 109489245, now seen corresponding path program 478 times [2021-05-22 01:56:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:42,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923785822] [2021-05-22 01:56:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:42,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923785822] [2021-05-22 01:56:42,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923785822] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:42,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:42,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838702089] [2021-05-22 01:56:42,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:42,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:42,939 INFO L87 Difference]: Start difference. First operand 1340 states and 5208 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:42,998 INFO L93 Difference]: Finished difference Result 2645 states and 9618 transitions. [2021-05-22 01:56:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:43,002 INFO L225 Difference]: With dead ends: 2645 [2021-05-22 01:56:43,002 INFO L226 Difference]: Without dead ends: 2379 [2021-05-22 01:56:43,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-05-22 01:56:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1296. [2021-05-22 01:56:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.8888030888030887) internal successors, (5036), 1295 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 5036 transitions. [2021-05-22 01:56:43,030 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 5036 transitions. Word has length 25 [2021-05-22 01:56:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:43,030 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 5036 transitions. [2021-05-22 01:56:43,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 5036 transitions. [2021-05-22 01:56:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:43,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:43,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:43,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482 [2021-05-22 01:56:43,032 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:43,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:43,032 INFO L82 PathProgramCache]: Analyzing trace with hash -272277313, now seen corresponding path program 479 times [2021-05-22 01:56:43,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:43,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033748503] [2021-05-22 01:56:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:43,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033748503] [2021-05-22 01:56:43,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033748503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:43,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:43,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:43,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223521088] [2021-05-22 01:56:43,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:43,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:43,123 INFO L87 Difference]: Start difference. First operand 1296 states and 5036 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:43,184 INFO L93 Difference]: Finished difference Result 2546 states and 9259 transitions. [2021-05-22 01:56:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:43,188 INFO L225 Difference]: With dead ends: 2546 [2021-05-22 01:56:43,188 INFO L226 Difference]: Without dead ends: 2371 [2021-05-22 01:56:43,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-05-22 01:56:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1336. [2021-05-22 01:56:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.8771535580524343) internal successors, (5176), 1335 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 5176 transitions. [2021-05-22 01:56:43,217 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 5176 transitions. Word has length 25 [2021-05-22 01:56:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:43,217 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 5176 transitions. [2021-05-22 01:56:43,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 5176 transitions. [2021-05-22 01:56:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:43,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:43,218 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:43,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483 [2021-05-22 01:56:43,218 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2093312739, now seen corresponding path program 480 times [2021-05-22 01:56:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:43,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070089019] [2021-05-22 01:56:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:43,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:43,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070089019] [2021-05-22 01:56:43,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070089019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:43,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:43,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:43,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689107281] [2021-05-22 01:56:43,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:43,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:43,310 INFO L87 Difference]: Start difference. First operand 1336 states and 5176 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:43,359 INFO L93 Difference]: Finished difference Result 2498 states and 9059 transitions. [2021-05-22 01:56:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:43,363 INFO L225 Difference]: With dead ends: 2498 [2021-05-22 01:56:43,363 INFO L226 Difference]: Without dead ends: 2202 [2021-05-22 01:56:43,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:43,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-05-22 01:56:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1262. [2021-05-22 01:56:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.9183187946074542) internal successors, (4941), 1261 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4941 transitions. [2021-05-22 01:56:43,392 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4941 transitions. Word has length 25 [2021-05-22 01:56:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:43,392 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4941 transitions. [2021-05-22 01:56:43,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4941 transitions. [2021-05-22 01:56:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:43,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:43,393 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:43,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484 [2021-05-22 01:56:43,394 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1302479273, now seen corresponding path program 481 times [2021-05-22 01:56:43,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:43,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302086570] [2021-05-22 01:56:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:43,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:43,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302086570] [2021-05-22 01:56:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302086570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142405512] [2021-05-22 01:56:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:43,483 INFO L87 Difference]: Start difference. First operand 1262 states and 4941 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:43,540 INFO L93 Difference]: Finished difference Result 2545 states and 9271 transitions. [2021-05-22 01:56:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:43,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:43,544 INFO L225 Difference]: With dead ends: 2545 [2021-05-22 01:56:43,544 INFO L226 Difference]: Without dead ends: 2386 [2021-05-22 01:56:43,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-05-22 01:56:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1286. [2021-05-22 01:56:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.9105058365758754) internal successors, (5025), 1285 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5025 transitions. [2021-05-22 01:56:43,573 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5025 transitions. Word has length 25 [2021-05-22 01:56:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:43,573 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 5025 transitions. [2021-05-22 01:56:43,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5025 transitions. [2021-05-22 01:56:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:43,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:43,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:43,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485 [2021-05-22 01:56:43,575 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1402553273, now seen corresponding path program 482 times [2021-05-22 01:56:43,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:43,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266896203] [2021-05-22 01:56:43,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:43,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266896203] [2021-05-22 01:56:43,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266896203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:43,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:43,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:43,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220288523] [2021-05-22 01:56:43,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:43,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:43,664 INFO L87 Difference]: Start difference. First operand 1286 states and 5025 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:43,731 INFO L93 Difference]: Finished difference Result 2575 states and 9364 transitions. [2021-05-22 01:56:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:43,736 INFO L225 Difference]: With dead ends: 2575 [2021-05-22 01:56:43,736 INFO L226 Difference]: Without dead ends: 2370 [2021-05-22 01:56:43,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-05-22 01:56:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1270. [2021-05-22 01:56:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.9156816390858946) internal successors, (4969), 1269 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4969 transitions. [2021-05-22 01:56:43,764 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4969 transitions. Word has length 25 [2021-05-22 01:56:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:43,764 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4969 transitions. [2021-05-22 01:56:43,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4969 transitions. [2021-05-22 01:56:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:43,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:43,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:43,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486 [2021-05-22 01:56:43,766 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash -221416647, now seen corresponding path program 483 times [2021-05-22 01:56:43,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:43,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443694996] [2021-05-22 01:56:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:43,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:43,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443694996] [2021-05-22 01:56:43,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443694996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:43,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:43,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:43,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574064701] [2021-05-22 01:56:43,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:43,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:43,857 INFO L87 Difference]: Start difference. First operand 1270 states and 4969 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:43,909 INFO L93 Difference]: Finished difference Result 2543 states and 9258 transitions. [2021-05-22 01:56:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:43,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:43,914 INFO L225 Difference]: With dead ends: 2543 [2021-05-22 01:56:43,914 INFO L226 Difference]: Without dead ends: 2384 [2021-05-22 01:56:43,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-05-22 01:56:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1286. [2021-05-22 01:56:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.9042801556420232) internal successors, (5017), 1285 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5017 transitions. [2021-05-22 01:56:43,942 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5017 transitions. Word has length 25 [2021-05-22 01:56:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:43,942 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 5017 transitions. [2021-05-22 01:56:43,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5017 transitions. [2021-05-22 01:56:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:43,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:43,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:43,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487 [2021-05-22 01:56:43,944 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:43,944 INFO L82 PathProgramCache]: Analyzing trace with hash 786881337, now seen corresponding path program 484 times [2021-05-22 01:56:43,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:43,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979836967] [2021-05-22 01:56:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:44,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979836967] [2021-05-22 01:56:44,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979836967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:44,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:44,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877364840] [2021-05-22 01:56:44,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:44,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:44,036 INFO L87 Difference]: Start difference. First operand 1286 states and 5017 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:44,107 INFO L93 Difference]: Finished difference Result 2571 states and 9346 transitions. [2021-05-22 01:56:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:44,112 INFO L225 Difference]: With dead ends: 2571 [2021-05-22 01:56:44,112 INFO L226 Difference]: Without dead ends: 2368 [2021-05-22 01:56:44,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-05-22 01:56:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1270. [2021-05-22 01:56:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.909377462568952) internal successors, (4961), 1269 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4961 transitions. [2021-05-22 01:56:44,140 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4961 transitions. Word has length 25 [2021-05-22 01:56:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:44,140 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4961 transitions. [2021-05-22 01:56:44,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4961 transitions. [2021-05-22 01:56:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:44,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:44,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:44,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488 [2021-05-22 01:56:44,142 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1195745307, now seen corresponding path program 485 times [2021-05-22 01:56:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:44,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364553476] [2021-05-22 01:56:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:44,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:44,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364553476] [2021-05-22 01:56:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364553476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901927237] [2021-05-22 01:56:44,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:44,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:44,223 INFO L87 Difference]: Start difference. First operand 1270 states and 4961 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:44,293 INFO L93 Difference]: Finished difference Result 2617 states and 9527 transitions. [2021-05-22 01:56:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:44,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:44,298 INFO L225 Difference]: With dead ends: 2617 [2021-05-22 01:56:44,298 INFO L226 Difference]: Without dead ends: 2428 [2021-05-22 01:56:44,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-05-22 01:56:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1300. [2021-05-22 01:56:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.890685142417244) internal successors, (5054), 1299 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 5054 transitions. [2021-05-22 01:56:44,326 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 5054 transitions. Word has length 25 [2021-05-22 01:56:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:44,327 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 5054 transitions. [2021-05-22 01:56:44,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 5054 transitions. [2021-05-22 01:56:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:44,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:44,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:44,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489 [2021-05-22 01:56:44,328 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash -847591687, now seen corresponding path program 486 times [2021-05-22 01:56:44,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:44,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181966098] [2021-05-22 01:56:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:44,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181966098] [2021-05-22 01:56:44,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181966098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:44,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:44,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432278942] [2021-05-22 01:56:44,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:44,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:44,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:44,410 INFO L87 Difference]: Start difference. First operand 1300 states and 5054 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:44,474 INFO L93 Difference]: Finished difference Result 2615 states and 9492 transitions. [2021-05-22 01:56:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:44,478 INFO L225 Difference]: With dead ends: 2615 [2021-05-22 01:56:44,478 INFO L226 Difference]: Without dead ends: 2390 [2021-05-22 01:56:44,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-05-22 01:56:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1262. [2021-05-22 01:56:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.915146708961142) internal successors, (4937), 1261 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4937 transitions. [2021-05-22 01:56:44,506 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4937 transitions. Word has length 25 [2021-05-22 01:56:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:44,507 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4937 transitions. [2021-05-22 01:56:44,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4937 transitions. [2021-05-22 01:56:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:44,508 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:44,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:44,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490 [2021-05-22 01:56:44,508 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1783381319, now seen corresponding path program 487 times [2021-05-22 01:56:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:44,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317322815] [2021-05-22 01:56:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:44,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317322815] [2021-05-22 01:56:44,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317322815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:44,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:44,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:44,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076919504] [2021-05-22 01:56:44,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:44,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:44,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:44,590 INFO L87 Difference]: Start difference. First operand 1262 states and 4937 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:44,640 INFO L93 Difference]: Finished difference Result 2539 states and 9248 transitions. [2021-05-22 01:56:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:44,645 INFO L225 Difference]: With dead ends: 2539 [2021-05-22 01:56:44,645 INFO L226 Difference]: Without dead ends: 2380 [2021-05-22 01:56:44,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-05-22 01:56:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1286. [2021-05-22 01:56:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.9073929961089493) internal successors, (5021), 1285 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5021 transitions. [2021-05-22 01:56:44,673 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5021 transitions. Word has length 25 [2021-05-22 01:56:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:44,673 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 5021 transitions. [2021-05-22 01:56:44,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5021 transitions. [2021-05-22 01:56:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:44,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:44,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:44,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491 [2021-05-22 01:56:44,675 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash 921651227, now seen corresponding path program 488 times [2021-05-22 01:56:44,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:44,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986177143] [2021-05-22 01:56:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:44,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986177143] [2021-05-22 01:56:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986177143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:44,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:44,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:44,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124333697] [2021-05-22 01:56:44,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:44,756 INFO L87 Difference]: Start difference. First operand 1286 states and 5021 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:44,828 INFO L93 Difference]: Finished difference Result 2569 states and 9341 transitions. [2021-05-22 01:56:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:44,833 INFO L225 Difference]: With dead ends: 2569 [2021-05-22 01:56:44,833 INFO L226 Difference]: Without dead ends: 2364 [2021-05-22 01:56:44,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-05-22 01:56:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1270. [2021-05-22 01:56:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.9125295508274234) internal successors, (4965), 1269 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4965 transitions. [2021-05-22 01:56:44,861 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4965 transitions. Word has length 25 [2021-05-22 01:56:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:44,861 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4965 transitions. [2021-05-22 01:56:44,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4965 transitions. [2021-05-22 01:56:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:44,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:44,863 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:44,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492 [2021-05-22 01:56:44,863 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash 823339705, now seen corresponding path program 489 times [2021-05-22 01:56:44,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:44,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310321577] [2021-05-22 01:56:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:44,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:44,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310321577] [2021-05-22 01:56:44,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310321577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:44,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:44,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155770221] [2021-05-22 01:56:44,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:44,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:44,939 INFO L87 Difference]: Start difference. First operand 1270 states and 4965 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:44,990 INFO L93 Difference]: Finished difference Result 2533 states and 9223 transitions. [2021-05-22 01:56:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:44,994 INFO L225 Difference]: With dead ends: 2533 [2021-05-22 01:56:44,994 INFO L226 Difference]: Without dead ends: 2374 [2021-05-22 01:56:44,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-05-22 01:56:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1286. [2021-05-22 01:56:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.901167315175097) internal successors, (5013), 1285 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5013 transitions. [2021-05-22 01:56:45,025 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5013 transitions. Word has length 25 [2021-05-22 01:56:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:45,025 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 5013 transitions. [2021-05-22 01:56:45,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5013 transitions. [2021-05-22 01:56:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:45,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:45,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:45,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493 [2021-05-22 01:56:45,027 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1791130951, now seen corresponding path program 490 times [2021-05-22 01:56:45,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:45,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796598124] [2021-05-22 01:56:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:45,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:45,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796598124] [2021-05-22 01:56:45,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796598124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:45,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:45,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:45,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651352775] [2021-05-22 01:56:45,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:45,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:45,100 INFO L87 Difference]: Start difference. First operand 1286 states and 5013 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:45,165 INFO L93 Difference]: Finished difference Result 2557 states and 9299 transitions. [2021-05-22 01:56:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:45,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:45,169 INFO L225 Difference]: With dead ends: 2557 [2021-05-22 01:56:45,169 INFO L226 Difference]: Without dead ends: 2358 [2021-05-22 01:56:45,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-05-22 01:56:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1270. [2021-05-22 01:56:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.906225374310481) internal successors, (4957), 1269 states have internal predecessors, (4957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4957 transitions. [2021-05-22 01:56:45,197 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4957 transitions. Word has length 25 [2021-05-22 01:56:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:45,197 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4957 transitions. [2021-05-22 01:56:45,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4957 transitions. [2021-05-22 01:56:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:45,199 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:45,199 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:45,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494 [2021-05-22 01:56:45,199 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2054465637, now seen corresponding path program 491 times [2021-05-22 01:56:45,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:45,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172249903] [2021-05-22 01:56:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:45,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:45,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172249903] [2021-05-22 01:56:45,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172249903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:45,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:45,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:45,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664716152] [2021-05-22 01:56:45,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:45,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:45,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:45,271 INFO L87 Difference]: Start difference. First operand 1270 states and 4957 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:45,330 INFO L93 Difference]: Finished difference Result 2605 states and 9485 transitions. [2021-05-22 01:56:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:45,334 INFO L225 Difference]: With dead ends: 2605 [2021-05-22 01:56:45,334 INFO L226 Difference]: Without dead ends: 2416 [2021-05-22 01:56:45,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-05-22 01:56:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1298. [2021-05-22 01:56:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.889745566692367) internal successors, (5045), 1297 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 5045 transitions. [2021-05-22 01:56:45,363 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 5045 transitions. Word has length 25 [2021-05-22 01:56:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:45,363 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 5045 transitions. [2021-05-22 01:56:45,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 5045 transitions. [2021-05-22 01:56:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:45,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:45,365 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:45,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495 [2021-05-22 01:56:45,365 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash 848357113, now seen corresponding path program 492 times [2021-05-22 01:56:45,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:45,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772549190] [2021-05-22 01:56:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:45,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772549190] [2021-05-22 01:56:45,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772549190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:45,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:45,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:45,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360248074] [2021-05-22 01:56:45,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:45,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:45,437 INFO L87 Difference]: Start difference. First operand 1298 states and 5045 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:45,497 INFO L93 Difference]: Finished difference Result 2599 states and 9440 transitions. [2021-05-22 01:56:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:45,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:45,502 INFO L225 Difference]: With dead ends: 2599 [2021-05-22 01:56:45,502 INFO L226 Difference]: Without dead ends: 2380 [2021-05-22 01:56:45,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-05-22 01:56:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1262. [2021-05-22 01:56:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.9119746233148294) internal successors, (4933), 1261 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4933 transitions. [2021-05-22 01:56:45,531 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4933 transitions. Word has length 25 [2021-05-22 01:56:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:45,531 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4933 transitions. [2021-05-22 01:56:45,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4933 transitions. [2021-05-22 01:56:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:45,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:45,533 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:45,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496 [2021-05-22 01:56:45,533 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1395376357, now seen corresponding path program 493 times [2021-05-22 01:56:45,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:45,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673872635] [2021-05-22 01:56:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:45,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673872635] [2021-05-22 01:56:45,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673872635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:45,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:45,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:45,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835687780] [2021-05-22 01:56:45,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:45,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:45,618 INFO L87 Difference]: Start difference. First operand 1262 states and 4933 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:45,669 INFO L93 Difference]: Finished difference Result 2535 states and 9234 transitions. [2021-05-22 01:56:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:45,673 INFO L225 Difference]: With dead ends: 2535 [2021-05-22 01:56:45,673 INFO L226 Difference]: Without dead ends: 2376 [2021-05-22 01:56:45,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-05-22 01:56:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1286. [2021-05-22 01:56:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.9042801556420232) internal successors, (5017), 1285 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5017 transitions. [2021-05-22 01:56:45,702 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5017 transitions. Word has length 25 [2021-05-22 01:56:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:45,702 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 5017 transitions. [2021-05-22 01:56:45,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5017 transitions. [2021-05-22 01:56:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:45,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:45,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:45,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497 [2021-05-22 01:56:45,703 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash -387078373, now seen corresponding path program 494 times [2021-05-22 01:56:45,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:45,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881279958] [2021-05-22 01:56:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:45,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:45,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881279958] [2021-05-22 01:56:45,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881279958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:45,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:45,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:45,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803138297] [2021-05-22 01:56:45,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:45,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:45,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:45,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:45,790 INFO L87 Difference]: Start difference. First operand 1286 states and 5017 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:45,852 INFO L93 Difference]: Finished difference Result 2563 states and 9322 transitions. [2021-05-22 01:56:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:45,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:45,857 INFO L225 Difference]: With dead ends: 2563 [2021-05-22 01:56:45,857 INFO L226 Difference]: Without dead ends: 2360 [2021-05-22 01:56:45,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-05-22 01:56:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1270. [2021-05-22 01:56:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.909377462568952) internal successors, (4961), 1269 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4961 transitions. [2021-05-22 01:56:45,885 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4961 transitions. Word has length 25 [2021-05-22 01:56:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:45,885 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4961 transitions. [2021-05-22 01:56:45,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4961 transitions. [2021-05-22 01:56:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:45,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:45,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:45,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498 [2021-05-22 01:56:45,887 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2052793977, now seen corresponding path program 495 times [2021-05-22 01:56:45,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:45,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235657956] [2021-05-22 01:56:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:45,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235657956] [2021-05-22 01:56:45,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235657956] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:45,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:45,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596064751] [2021-05-22 01:56:45,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:45,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:45,962 INFO L87 Difference]: Start difference. First operand 1270 states and 4961 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:46,009 INFO L93 Difference]: Finished difference Result 2531 states and 9214 transitions. [2021-05-22 01:56:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:46,013 INFO L225 Difference]: With dead ends: 2531 [2021-05-22 01:56:46,013 INFO L226 Difference]: Without dead ends: 2372 [2021-05-22 01:56:46,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-05-22 01:56:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1286. [2021-05-22 01:56:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.898054474708171) internal successors, (5009), 1285 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5009 transitions. [2021-05-22 01:56:46,042 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5009 transitions. Word has length 25 [2021-05-22 01:56:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:46,042 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 5009 transitions. [2021-05-22 01:56:46,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5009 transitions. [2021-05-22 01:56:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:46,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:46,043 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:46,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499 [2021-05-22 01:56:46,044 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:46,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2022934299, now seen corresponding path program 496 times [2021-05-22 01:56:46,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:46,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644814429] [2021-05-22 01:56:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:46,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:46,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644814429] [2021-05-22 01:56:46,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644814429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:46,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:46,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:46,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678609250] [2021-05-22 01:56:46,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:46,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:46,118 INFO L87 Difference]: Start difference. First operand 1286 states and 5009 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:46,178 INFO L93 Difference]: Finished difference Result 2555 states and 9290 transitions. [2021-05-22 01:56:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:46,183 INFO L225 Difference]: With dead ends: 2555 [2021-05-22 01:56:46,183 INFO L226 Difference]: Without dead ends: 2356 [2021-05-22 01:56:46,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-22 01:56:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1270. [2021-05-22 01:56:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.9030732860520096) internal successors, (4953), 1269 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4953 transitions. [2021-05-22 01:56:46,211 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4953 transitions. Word has length 25 [2021-05-22 01:56:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:46,211 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4953 transitions. [2021-05-22 01:56:46,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4953 transitions. [2021-05-22 01:56:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:46,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:46,212 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:46,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500 [2021-05-22 01:56:46,213 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash -337510629, now seen corresponding path program 497 times [2021-05-22 01:56:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:46,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792530517] [2021-05-22 01:56:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:46,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792530517] [2021-05-22 01:56:46,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792530517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:46,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:46,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:46,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728985045] [2021-05-22 01:56:46,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:46,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:46,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:46,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:46,287 INFO L87 Difference]: Start difference. First operand 1270 states and 4953 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:46,352 INFO L93 Difference]: Finished difference Result 2599 states and 9466 transitions. [2021-05-22 01:56:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:46,356 INFO L225 Difference]: With dead ends: 2599 [2021-05-22 01:56:46,356 INFO L226 Difference]: Without dead ends: 2412 [2021-05-22 01:56:46,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-22 01:56:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1298. [2021-05-22 01:56:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.8866615265998457) internal successors, (5041), 1297 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 5041 transitions. [2021-05-22 01:56:46,385 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 5041 transitions. Word has length 25 [2021-05-22 01:56:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:46,385 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 5041 transitions. [2021-05-22 01:56:46,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 5041 transitions. [2021-05-22 01:56:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:46,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:46,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:46,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501 [2021-05-22 01:56:46,387 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:46,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1914119673, now seen corresponding path program 498 times [2021-05-22 01:56:46,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:46,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143257911] [2021-05-22 01:56:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:46,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:46,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143257911] [2021-05-22 01:56:46,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143257911] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:46,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:46,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:46,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044923750] [2021-05-22 01:56:46,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:46,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:46,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:46,463 INFO L87 Difference]: Start difference. First operand 1298 states and 5041 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:46,526 INFO L93 Difference]: Finished difference Result 2595 states and 9426 transitions. [2021-05-22 01:56:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:46,531 INFO L225 Difference]: With dead ends: 2595 [2021-05-22 01:56:46,531 INFO L226 Difference]: Without dead ends: 2376 [2021-05-22 01:56:46,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-05-22 01:56:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1262. [2021-05-22 01:56:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.908802537668517) internal successors, (4929), 1261 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4929 transitions. [2021-05-22 01:56:46,559 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4929 transitions. Word has length 25 [2021-05-22 01:56:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:46,559 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4929 transitions. [2021-05-22 01:56:46,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4929 transitions. [2021-05-22 01:56:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:46,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:46,561 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:46,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502 [2021-05-22 01:56:46,561 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:46,561 INFO L82 PathProgramCache]: Analyzing trace with hash -671272067, now seen corresponding path program 499 times [2021-05-22 01:56:46,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:46,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601466218] [2021-05-22 01:56:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:46,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:46,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601466218] [2021-05-22 01:56:46,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601466218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:46,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:46,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:46,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136154358] [2021-05-22 01:56:46,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:46,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:46,635 INFO L87 Difference]: Start difference. First operand 1262 states and 4929 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:46,694 INFO L93 Difference]: Finished difference Result 2671 states and 9756 transitions. [2021-05-22 01:56:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:46,700 INFO L225 Difference]: With dead ends: 2671 [2021-05-22 01:56:46,700 INFO L226 Difference]: Without dead ends: 2482 [2021-05-22 01:56:46,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-05-22 01:56:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1306. [2021-05-22 01:56:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8980842911877396) internal successors, (5087), 1305 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5087 transitions. [2021-05-22 01:56:46,730 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5087 transitions. Word has length 25 [2021-05-22 01:56:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:46,730 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5087 transitions. [2021-05-22 01:56:46,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5087 transitions. [2021-05-22 01:56:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:46,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:46,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:46,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503 [2021-05-22 01:56:46,732 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1580358235, now seen corresponding path program 500 times [2021-05-22 01:56:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670948151] [2021-05-22 01:56:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:46,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:46,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670948151] [2021-05-22 01:56:46,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670948151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:46,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:46,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:46,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82945977] [2021-05-22 01:56:46,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:46,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:46,806 INFO L87 Difference]: Start difference. First operand 1306 states and 5087 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:46,864 INFO L93 Difference]: Finished difference Result 2669 states and 9721 transitions. [2021-05-22 01:56:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:46,869 INFO L225 Difference]: With dead ends: 2669 [2021-05-22 01:56:46,869 INFO L226 Difference]: Without dead ends: 2452 [2021-05-22 01:56:46,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-05-22 01:56:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1276. [2021-05-22 01:56:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.9058823529411764) internal successors, (4980), 1275 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4980 transitions. [2021-05-22 01:56:46,907 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4980 transitions. Word has length 25 [2021-05-22 01:56:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:46,907 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4980 transitions. [2021-05-22 01:56:46,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4980 transitions. [2021-05-22 01:56:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:46,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:46,909 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:46,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504 [2021-05-22 01:56:46,909 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1518069029, now seen corresponding path program 501 times [2021-05-22 01:56:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:46,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103869340] [2021-05-22 01:56:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:46,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:46,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103869340] [2021-05-22 01:56:46,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103869340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:46,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:46,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:46,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089146224] [2021-05-22 01:56:46,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:46,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:46,982 INFO L87 Difference]: Start difference. First operand 1276 states and 4980 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:47,040 INFO L93 Difference]: Finished difference Result 2665 states and 9723 transitions. [2021-05-22 01:56:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:47,045 INFO L225 Difference]: With dead ends: 2665 [2021-05-22 01:56:47,045 INFO L226 Difference]: Without dead ends: 2476 [2021-05-22 01:56:47,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-05-22 01:56:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1304. [2021-05-22 01:56:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.889485801995395) internal successors, (5068), 1303 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 5068 transitions. [2021-05-22 01:56:47,074 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 5068 transitions. Word has length 25 [2021-05-22 01:56:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:47,075 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 5068 transitions. [2021-05-22 01:56:47,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 5068 transitions. [2021-05-22 01:56:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:47,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:47,076 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:47,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505 [2021-05-22 01:56:47,076 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash -325602597, now seen corresponding path program 502 times [2021-05-22 01:56:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296996600] [2021-05-22 01:56:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:47,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:47,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296996600] [2021-05-22 01:56:47,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296996600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:47,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:47,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:47,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856362544] [2021-05-22 01:56:47,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:47,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:47,149 INFO L87 Difference]: Start difference. First operand 1304 states and 5068 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:47,212 INFO L93 Difference]: Finished difference Result 2659 states and 9678 transitions. [2021-05-22 01:56:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:47,216 INFO L225 Difference]: With dead ends: 2659 [2021-05-22 01:56:47,216 INFO L226 Difference]: Without dead ends: 2448 [2021-05-22 01:56:47,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-05-22 01:56:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1276. [2021-05-22 01:56:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.894901960784314) internal successors, (4966), 1275 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4966 transitions. [2021-05-22 01:56:47,245 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4966 transitions. Word has length 25 [2021-05-22 01:56:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:47,245 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4966 transitions. [2021-05-22 01:56:47,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4966 transitions. [2021-05-22 01:56:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:47,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:47,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:47,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506 [2021-05-22 01:56:47,247 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash -535721415, now seen corresponding path program 503 times [2021-05-22 01:56:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:47,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942679895] [2021-05-22 01:56:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:47,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:47,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942679895] [2021-05-22 01:56:47,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942679895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:47,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:47,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:47,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707660635] [2021-05-22 01:56:47,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:47,334 INFO L87 Difference]: Start difference. First operand 1276 states and 4966 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:47,408 INFO L93 Difference]: Finished difference Result 2661 states and 9699 transitions. [2021-05-22 01:56:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:47,414 INFO L225 Difference]: With dead ends: 2661 [2021-05-22 01:56:47,414 INFO L226 Difference]: Without dead ends: 2474 [2021-05-22 01:56:47,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-05-22 01:56:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1304. [2021-05-22 01:56:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.878741366078281) internal successors, (5054), 1303 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 5054 transitions. [2021-05-22 01:56:47,457 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 5054 transitions. Word has length 25 [2021-05-22 01:56:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:47,457 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 5054 transitions. [2021-05-22 01:56:47,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 5054 transitions. [2021-05-22 01:56:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:47,460 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:47,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:47,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507 [2021-05-22 01:56:47,460 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash 545341211, now seen corresponding path program 504 times [2021-05-22 01:56:47,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:47,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546227528] [2021-05-22 01:56:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:47,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:47,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546227528] [2021-05-22 01:56:47,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546227528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:47,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:47,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:47,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104620518] [2021-05-22 01:56:47,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:47,547 INFO L87 Difference]: Start difference. First operand 1304 states and 5054 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:47,630 INFO L93 Difference]: Finished difference Result 2657 states and 9659 transitions. [2021-05-22 01:56:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:47,636 INFO L225 Difference]: With dead ends: 2657 [2021-05-22 01:56:47,636 INFO L226 Difference]: Without dead ends: 2428 [2021-05-22 01:56:47,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-05-22 01:56:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1258. [2021-05-22 01:56:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.913285600636436) internal successors, (4919), 1257 states have internal predecessors, (4919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4919 transitions. [2021-05-22 01:56:47,677 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4919 transitions. Word has length 25 [2021-05-22 01:56:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:47,677 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4919 transitions. [2021-05-22 01:56:47,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4919 transitions. [2021-05-22 01:56:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:47,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:47,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:47,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508 [2021-05-22 01:56:47,679 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash 407122489, now seen corresponding path program 505 times [2021-05-22 01:56:47,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:47,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308809434] [2021-05-22 01:56:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:47,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:47,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308809434] [2021-05-22 01:56:47,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308809434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:47,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:47,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:47,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473232752] [2021-05-22 01:56:47,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:47,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:47,777 INFO L87 Difference]: Start difference. First operand 1258 states and 4919 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:47,830 INFO L93 Difference]: Finished difference Result 2515 states and 9144 transitions. [2021-05-22 01:56:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:47,834 INFO L225 Difference]: With dead ends: 2515 [2021-05-22 01:56:47,834 INFO L226 Difference]: Without dead ends: 2356 [2021-05-22 01:56:47,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-22 01:56:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1274. [2021-05-22 01:56:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.9018067556952083) internal successors, (4967), 1273 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4967 transitions. [2021-05-22 01:56:47,863 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4967 transitions. Word has length 25 [2021-05-22 01:56:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:47,863 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4967 transitions. [2021-05-22 01:56:47,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4967 transitions. [2021-05-22 01:56:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:47,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:47,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:47,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509 [2021-05-22 01:56:47,865 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1182812261, now seen corresponding path program 506 times [2021-05-22 01:56:47,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:47,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985134224] [2021-05-22 01:56:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:47,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:47,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985134224] [2021-05-22 01:56:47,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985134224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:47,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:47,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:47,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630571907] [2021-05-22 01:56:47,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:47,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:47,955 INFO L87 Difference]: Start difference. First operand 1274 states and 4967 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:48,024 INFO L93 Difference]: Finished difference Result 2545 states and 9237 transitions. [2021-05-22 01:56:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:48,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:48,029 INFO L225 Difference]: With dead ends: 2545 [2021-05-22 01:56:48,029 INFO L226 Difference]: Without dead ends: 2340 [2021-05-22 01:56:48,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-05-22 01:56:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 1258. [2021-05-22 01:56:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.9069212410501195) internal successors, (4911), 1257 states have internal predecessors, (4911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4911 transitions. [2021-05-22 01:56:48,058 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4911 transitions. Word has length 25 [2021-05-22 01:56:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:48,058 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4911 transitions. [2021-05-22 01:56:48,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4911 transitions. [2021-05-22 01:56:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:48,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:48,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:48,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510 [2021-05-22 01:56:48,059 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1488185115, now seen corresponding path program 507 times [2021-05-22 01:56:48,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:48,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650456575] [2021-05-22 01:56:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:48,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650456575] [2021-05-22 01:56:48,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650456575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:48,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:48,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:48,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455888332] [2021-05-22 01:56:48,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:48,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:48,153 INFO L87 Difference]: Start difference. First operand 1258 states and 4911 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:48,212 INFO L93 Difference]: Finished difference Result 2513 states and 9131 transitions. [2021-05-22 01:56:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:48,217 INFO L225 Difference]: With dead ends: 2513 [2021-05-22 01:56:48,217 INFO L226 Difference]: Without dead ends: 2354 [2021-05-22 01:56:48,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-05-22 01:56:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1274. [2021-05-22 01:56:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.8955223880597014) internal successors, (4959), 1273 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4959 transitions. [2021-05-22 01:56:48,248 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4959 transitions. Word has length 25 [2021-05-22 01:56:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:48,249 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4959 transitions. [2021-05-22 01:56:48,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4959 transitions. [2021-05-22 01:56:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:48,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:48,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:48,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511 [2021-05-22 01:56:48,250 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1798484197, now seen corresponding path program 508 times [2021-05-22 01:56:48,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:48,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951049471] [2021-05-22 01:56:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:48,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:48,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951049471] [2021-05-22 01:56:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951049471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:48,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:48,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:48,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517098936] [2021-05-22 01:56:48,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:48,348 INFO L87 Difference]: Start difference. First operand 1274 states and 4959 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:48,412 INFO L93 Difference]: Finished difference Result 2541 states and 9219 transitions. [2021-05-22 01:56:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:48,417 INFO L225 Difference]: With dead ends: 2541 [2021-05-22 01:56:48,417 INFO L226 Difference]: Without dead ends: 2338 [2021-05-22 01:56:48,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-05-22 01:56:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1258. [2021-05-22 01:56:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.9005568814638027) internal successors, (4903), 1257 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4903 transitions. [2021-05-22 01:56:48,445 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4903 transitions. Word has length 25 [2021-05-22 01:56:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:48,446 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4903 transitions. [2021-05-22 01:56:48,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4903 transitions. [2021-05-22 01:56:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:48,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:48,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:48,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512 [2021-05-22 01:56:48,447 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1389620227, now seen corresponding path program 509 times [2021-05-22 01:56:48,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:48,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883258851] [2021-05-22 01:56:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:48,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:48,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883258851] [2021-05-22 01:56:48,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883258851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:48,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:48,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:48,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639043213] [2021-05-22 01:56:48,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:48,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:48,533 INFO L87 Difference]: Start difference. First operand 1258 states and 4903 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:48,593 INFO L93 Difference]: Finished difference Result 2587 states and 9400 transitions. [2021-05-22 01:56:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:48,597 INFO L225 Difference]: With dead ends: 2587 [2021-05-22 01:56:48,597 INFO L226 Difference]: Without dead ends: 2398 [2021-05-22 01:56:48,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-05-22 01:56:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1288. [2021-05-22 01:56:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.8818958818958818) internal successors, (4996), 1287 states have internal predecessors, (4996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4996 transitions. [2021-05-22 01:56:48,627 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4996 transitions. Word has length 25 [2021-05-22 01:56:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:48,627 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4996 transitions. [2021-05-22 01:56:48,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4996 transitions. [2021-05-22 01:56:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:48,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:48,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:48,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513 [2021-05-22 01:56:48,628 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash 862010075, now seen corresponding path program 510 times [2021-05-22 01:56:48,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:48,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068278620] [2021-05-22 01:56:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:48,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068278620] [2021-05-22 01:56:48,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068278620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:48,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:48,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:48,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493458720] [2021-05-22 01:56:48,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:48,721 INFO L87 Difference]: Start difference. First operand 1288 states and 4996 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:48,787 INFO L93 Difference]: Finished difference Result 2585 states and 9365 transitions. [2021-05-22 01:56:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:48,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:48,792 INFO L225 Difference]: With dead ends: 2585 [2021-05-22 01:56:48,792 INFO L226 Difference]: Without dead ends: 2360 [2021-05-22 01:56:48,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-05-22 01:56:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1250. [2021-05-22 01:56:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.9063250600480384) internal successors, (4879), 1249 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4879 transitions. [2021-05-22 01:56:48,820 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4879 transitions. Word has length 25 [2021-05-22 01:56:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:48,820 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4879 transitions. [2021-05-22 01:56:48,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4879 transitions. [2021-05-22 01:56:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:48,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:48,822 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:48,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514 [2021-05-22 01:56:48,822 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:48,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1500092985, now seen corresponding path program 511 times [2021-05-22 01:56:48,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:48,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512744179] [2021-05-22 01:56:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:48,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:48,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512744179] [2021-05-22 01:56:48,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512744179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:48,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:48,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846917267] [2021-05-22 01:56:48,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:48,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:48,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:48,912 INFO L87 Difference]: Start difference. First operand 1250 states and 4879 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:48,964 INFO L93 Difference]: Finished difference Result 2481 states and 9013 transitions. [2021-05-22 01:56:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:48,968 INFO L225 Difference]: With dead ends: 2481 [2021-05-22 01:56:48,968 INFO L226 Difference]: Without dead ends: 2322 [2021-05-22 01:56:48,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-05-22 01:56:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1274. [2021-05-22 01:56:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.898664571877455) internal successors, (4963), 1273 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4963 transitions. [2021-05-22 01:56:48,997 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4963 transitions. Word has length 25 [2021-05-22 01:56:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:48,997 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4963 transitions. [2021-05-22 01:56:48,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4963 transitions. [2021-05-22 01:56:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:48,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:48,999 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:48,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515 [2021-05-22 01:56:48,999 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -89841765, now seen corresponding path program 512 times [2021-05-22 01:56:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:48,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648500212] [2021-05-22 01:56:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:49,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:49,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648500212] [2021-05-22 01:56:49,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648500212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:49,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:49,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:49,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736998481] [2021-05-22 01:56:49,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:49,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:49,088 INFO L87 Difference]: Start difference. First operand 1274 states and 4963 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:49,164 INFO L93 Difference]: Finished difference Result 2511 states and 9106 transitions. [2021-05-22 01:56:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:49,168 INFO L225 Difference]: With dead ends: 2511 [2021-05-22 01:56:49,168 INFO L226 Difference]: Without dead ends: 2306 [2021-05-22 01:56:49,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-05-22 01:56:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1258. [2021-05-22 01:56:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.903739061256961) internal successors, (4907), 1257 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4907 transitions. [2021-05-22 01:56:49,195 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4907 transitions. Word has length 25 [2021-05-22 01:56:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:49,195 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4907 transitions. [2021-05-22 01:56:49,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4907 transitions. [2021-05-22 01:56:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:49,197 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:49,197 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:49,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516 [2021-05-22 01:56:49,197 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1549660729, now seen corresponding path program 513 times [2021-05-22 01:56:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20233965] [2021-05-22 01:56:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:49,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:49,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20233965] [2021-05-22 01:56:49,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20233965] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:49,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:49,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:49,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334646070] [2021-05-22 01:56:49,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:49,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:49,279 INFO L87 Difference]: Start difference. First operand 1258 states and 4907 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:49,331 INFO L93 Difference]: Finished difference Result 2435 states and 8848 transitions. [2021-05-22 01:56:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:49,335 INFO L225 Difference]: With dead ends: 2435 [2021-05-22 01:56:49,335 INFO L226 Difference]: Without dead ends: 2276 [2021-05-22 01:56:49,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-05-22 01:56:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1274. [2021-05-22 01:56:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.892380204241948) internal successors, (4955), 1273 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4955 transitions. [2021-05-22 01:56:49,363 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4955 transitions. Word has length 25 [2021-05-22 01:56:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:49,363 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4955 transitions. [2021-05-22 01:56:49,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4955 transitions. [2021-05-22 01:56:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:49,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:49,365 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:49,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517 [2021-05-22 01:56:49,365 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -392611271, now seen corresponding path program 514 times [2021-05-22 01:56:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:49,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39363016] [2021-05-22 01:56:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:49,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39363016] [2021-05-22 01:56:49,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39363016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:49,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:49,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:49,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125796649] [2021-05-22 01:56:49,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:49,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:49,446 INFO L87 Difference]: Start difference. First operand 1274 states and 4955 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:49,508 INFO L93 Difference]: Finished difference Result 2323 states and 8511 transitions. [2021-05-22 01:56:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:49,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:49,512 INFO L225 Difference]: With dead ends: 2323 [2021-05-22 01:56:49,513 INFO L226 Difference]: Without dead ends: 2132 [2021-05-22 01:56:49,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-05-22 01:56:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1258. [2021-05-22 01:56:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.8973747016706444) internal successors, (4899), 1257 states have internal predecessors, (4899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4899 transitions. [2021-05-22 01:56:49,539 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4899 transitions. Word has length 25 [2021-05-22 01:56:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:49,539 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4899 transitions. [2021-05-22 01:56:49,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4899 transitions. [2021-05-22 01:56:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:49,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:49,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:49,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2021-05-22 01:56:49,541 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1328144613, now seen corresponding path program 515 times [2021-05-22 01:56:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:49,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727522706] [2021-05-22 01:56:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:49,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727522706] [2021-05-22 01:56:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727522706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:49,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:49,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133385226] [2021-05-22 01:56:49,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:49,632 INFO L87 Difference]: Start difference. First operand 1258 states and 4899 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:49,698 INFO L93 Difference]: Finished difference Result 2473 states and 8985 transitions. [2021-05-22 01:56:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:49,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:49,702 INFO L225 Difference]: With dead ends: 2473 [2021-05-22 01:56:49,702 INFO L226 Difference]: Without dead ends: 2284 [2021-05-22 01:56:49,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-05-22 01:56:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1282. [2021-05-22 01:56:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.8836846213895395) internal successors, (4975), 1281 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4975 transitions. [2021-05-22 01:56:49,730 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4975 transitions. Word has length 25 [2021-05-22 01:56:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:49,730 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4975 transitions. [2021-05-22 01:56:49,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4975 transitions. [2021-05-22 01:56:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:49,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:49,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:49,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-05-22 01:56:49,731 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2069096711, now seen corresponding path program 516 times [2021-05-22 01:56:49,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:49,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267812299] [2021-05-22 01:56:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267812299] [2021-05-22 01:56:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267812299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:49,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:49,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:49,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38053335] [2021-05-22 01:56:49,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:49,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:49,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:49,822 INFO L87 Difference]: Start difference. First operand 1282 states and 4975 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:49,882 INFO L93 Difference]: Finished difference Result 2331 states and 8531 transitions. [2021-05-22 01:56:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:49,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:49,886 INFO L225 Difference]: With dead ends: 2331 [2021-05-22 01:56:49,886 INFO L226 Difference]: Without dead ends: 2124 [2021-05-22 01:56:49,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-05-22 01:56:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1250. [2021-05-22 01:56:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.9031224979983987) internal successors, (4875), 1249 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4875 transitions. [2021-05-22 01:56:49,913 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4875 transitions. Word has length 25 [2021-05-22 01:56:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:49,913 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4875 transitions. [2021-05-22 01:56:49,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4875 transitions. [2021-05-22 01:56:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:49,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:49,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:49,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-05-22 01:56:49,915 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1888097947, now seen corresponding path program 517 times [2021-05-22 01:56:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:49,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497579480] [2021-05-22 01:56:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:49,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:49,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497579480] [2021-05-22 01:56:49,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497579480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:49,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:49,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:49,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667017193] [2021-05-22 01:56:49,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:49,997 INFO L87 Difference]: Start difference. First operand 1250 states and 4875 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:50,049 INFO L93 Difference]: Finished difference Result 2477 states and 8999 transitions. [2021-05-22 01:56:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:50,053 INFO L225 Difference]: With dead ends: 2477 [2021-05-22 01:56:50,053 INFO L226 Difference]: Without dead ends: 2318 [2021-05-22 01:56:50,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-05-22 01:56:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1274. [2021-05-22 01:56:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.8955223880597014) internal successors, (4959), 1273 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4959 transitions. [2021-05-22 01:56:50,081 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4959 transitions. Word has length 25 [2021-05-22 01:56:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:50,081 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4959 transitions. [2021-05-22 01:56:50,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4959 transitions. [2021-05-22 01:56:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:50,083 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:50,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:50,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable521 [2021-05-22 01:56:50,083 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1398571365, now seen corresponding path program 518 times [2021-05-22 01:56:50,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:50,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862874565] [2021-05-22 01:56:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:50,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:50,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862874565] [2021-05-22 01:56:50,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862874565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:50,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:50,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:50,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889109904] [2021-05-22 01:56:50,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:50,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:50,165 INFO L87 Difference]: Start difference. First operand 1274 states and 4959 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:50,227 INFO L93 Difference]: Finished difference Result 2505 states and 9087 transitions. [2021-05-22 01:56:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:50,231 INFO L225 Difference]: With dead ends: 2505 [2021-05-22 01:56:50,231 INFO L226 Difference]: Without dead ends: 2302 [2021-05-22 01:56:50,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-05-22 01:56:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1258. [2021-05-22 01:56:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.9005568814638027) internal successors, (4903), 1257 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4903 transitions. [2021-05-22 01:56:50,259 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4903 transitions. Word has length 25 [2021-05-22 01:56:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:50,259 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4903 transitions. [2021-05-22 01:56:50,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4903 transitions. [2021-05-22 01:56:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:50,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:50,260 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:50,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522 [2021-05-22 01:56:50,260 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -227981703, now seen corresponding path program 519 times [2021-05-22 01:56:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:50,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739643527] [2021-05-22 01:56:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:50,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:50,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739643527] [2021-05-22 01:56:50,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739643527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:50,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:50,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:50,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408046364] [2021-05-22 01:56:50,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:50,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:50,336 INFO L87 Difference]: Start difference. First operand 1258 states and 4903 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:50,388 INFO L93 Difference]: Finished difference Result 2433 states and 8839 transitions. [2021-05-22 01:56:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:50,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:50,392 INFO L225 Difference]: With dead ends: 2433 [2021-05-22 01:56:50,393 INFO L226 Difference]: Without dead ends: 2274 [2021-05-22 01:56:50,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-05-22 01:56:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1274. [2021-05-22 01:56:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.889238020424195) internal successors, (4951), 1273 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4951 transitions. [2021-05-22 01:56:50,420 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4951 transitions. Word has length 25 [2021-05-22 01:56:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:50,420 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4951 transitions. [2021-05-22 01:56:50,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4951 transitions. [2021-05-22 01:56:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:50,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:50,422 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:50,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523 [2021-05-22 01:56:50,422 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:50,422 INFO L82 PathProgramCache]: Analyzing trace with hash -873513317, now seen corresponding path program 520 times [2021-05-22 01:56:50,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:50,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639565616] [2021-05-22 01:56:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:50,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:50,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639565616] [2021-05-22 01:56:50,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639565616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:50,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:50,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:50,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82879052] [2021-05-22 01:56:50,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:50,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:50,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:50,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:50,497 INFO L87 Difference]: Start difference. First operand 1274 states and 4951 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:50,560 INFO L93 Difference]: Finished difference Result 2321 states and 8502 transitions. [2021-05-22 01:56:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:50,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:50,564 INFO L225 Difference]: With dead ends: 2321 [2021-05-22 01:56:50,564 INFO L226 Difference]: Without dead ends: 2130 [2021-05-22 01:56:50,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-05-22 01:56:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1258. [2021-05-22 01:56:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.894192521877486) internal successors, (4895), 1257 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4895 transitions. [2021-05-22 01:56:50,591 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4895 transitions. Word has length 25 [2021-05-22 01:56:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:50,591 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4895 transitions. [2021-05-22 01:56:50,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4895 transitions. [2021-05-22 01:56:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:50,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:50,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:50,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524 [2021-05-22 01:56:50,593 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash 388810395, now seen corresponding path program 521 times [2021-05-22 01:56:50,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:50,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959326815] [2021-05-22 01:56:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:50,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959326815] [2021-05-22 01:56:50,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959326815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:50,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:50,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:50,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588258280] [2021-05-22 01:56:50,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:50,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:50,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:50,678 INFO L87 Difference]: Start difference. First operand 1258 states and 4895 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:50,744 INFO L93 Difference]: Finished difference Result 2469 states and 8971 transitions. [2021-05-22 01:56:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:50,748 INFO L225 Difference]: With dead ends: 2469 [2021-05-22 01:56:50,748 INFO L226 Difference]: Without dead ends: 2282 [2021-05-22 01:56:50,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-05-22 01:56:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1282. [2021-05-22 01:56:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.88056206088993) internal successors, (4971), 1281 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4971 transitions. [2021-05-22 01:56:50,776 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4971 transitions. Word has length 25 [2021-05-22 01:56:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:50,776 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4971 transitions. [2021-05-22 01:56:50,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4971 transitions. [2021-05-22 01:56:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:50,777 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:50,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:50,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525 [2021-05-22 01:56:50,777 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1003334151, now seen corresponding path program 522 times [2021-05-22 01:56:50,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:50,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969841811] [2021-05-22 01:56:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:50,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:50,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969841811] [2021-05-22 01:56:50,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969841811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:50,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:50,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:50,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323738318] [2021-05-22 01:56:50,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:50,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:50,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:50,852 INFO L87 Difference]: Start difference. First operand 1282 states and 4971 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:50,915 INFO L93 Difference]: Finished difference Result 2329 states and 8522 transitions. [2021-05-22 01:56:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:50,919 INFO L225 Difference]: With dead ends: 2329 [2021-05-22 01:56:50,919 INFO L226 Difference]: Without dead ends: 2122 [2021-05-22 01:56:50,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-05-22 01:56:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1250. [2021-05-22 01:56:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.899919935948759) internal successors, (4871), 1249 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4871 transitions. [2021-05-22 01:56:50,946 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4871 transitions. Word has length 25 [2021-05-22 01:56:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:50,946 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4871 transitions. [2021-05-22 01:56:50,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4871 transitions. [2021-05-22 01:56:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:50,947 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:50,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:50,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-05-22 01:56:50,947 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:50,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1682765059, now seen corresponding path program 523 times [2021-05-22 01:56:50,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:50,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434030501] [2021-05-22 01:56:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:51,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:51,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434030501] [2021-05-22 01:56:51,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434030501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:51,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:51,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:51,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267485045] [2021-05-22 01:56:51,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:51,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:51,021 INFO L87 Difference]: Start difference. First operand 1250 states and 4871 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:51,085 INFO L93 Difference]: Finished difference Result 2593 states and 9437 transitions. [2021-05-22 01:56:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:51,090 INFO L225 Difference]: With dead ends: 2593 [2021-05-22 01:56:51,090 INFO L226 Difference]: Without dead ends: 2404 [2021-05-22 01:56:51,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-05-22 01:56:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1292. [2021-05-22 01:56:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.8884585592563905) internal successors, (5020), 1291 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5020 transitions. [2021-05-22 01:56:51,118 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5020 transitions. Word has length 25 [2021-05-22 01:56:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:51,118 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5020 transitions. [2021-05-22 01:56:51,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5020 transitions. [2021-05-22 01:56:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:51,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:51,120 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:51,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-05-22 01:56:51,120 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash 568865243, now seen corresponding path program 524 times [2021-05-22 01:56:51,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:51,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718558181] [2021-05-22 01:56:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:51,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718558181] [2021-05-22 01:56:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718558181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:51,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:51,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:51,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247444785] [2021-05-22 01:56:51,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:51,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:51,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:51,195 INFO L87 Difference]: Start difference. First operand 1292 states and 5020 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:51,256 INFO L93 Difference]: Finished difference Result 2591 states and 9402 transitions. [2021-05-22 01:56:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:51,261 INFO L225 Difference]: With dead ends: 2591 [2021-05-22 01:56:51,261 INFO L226 Difference]: Without dead ends: 2374 [2021-05-22 01:56:51,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-05-22 01:56:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1262. [2021-05-22 01:56:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.8977002379064234) internal successors, (4915), 1261 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4915 transitions. [2021-05-22 01:56:51,299 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4915 transitions. Word has length 25 [2021-05-22 01:56:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:51,299 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4915 transitions. [2021-05-22 01:56:51,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4915 transitions. [2021-05-22 01:56:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:51,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:51,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:51,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528 [2021-05-22 01:56:51,300 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash 496122587, now seen corresponding path program 525 times [2021-05-22 01:56:51,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:51,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141872714] [2021-05-22 01:56:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:51,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:51,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141872714] [2021-05-22 01:56:51,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141872714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:51,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:51,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:51,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967132697] [2021-05-22 01:56:51,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:51,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:51,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:51,383 INFO L87 Difference]: Start difference. First operand 1262 states and 4915 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:51,447 INFO L93 Difference]: Finished difference Result 2513 states and 9141 transitions. [2021-05-22 01:56:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:51,451 INFO L225 Difference]: With dead ends: 2513 [2021-05-22 01:56:51,452 INFO L226 Difference]: Without dead ends: 2324 [2021-05-22 01:56:51,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-05-22 01:56:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1286. [2021-05-22 01:56:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.884046692607004) internal successors, (4991), 1285 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4991 transitions. [2021-05-22 01:56:51,480 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4991 transitions. Word has length 25 [2021-05-22 01:56:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:51,480 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 4991 transitions. [2021-05-22 01:56:51,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4991 transitions. [2021-05-22 01:56:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:51,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:51,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:51,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529 [2021-05-22 01:56:51,482 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1051910875, now seen corresponding path program 526 times [2021-05-22 01:56:51,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:51,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434684032] [2021-05-22 01:56:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:51,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:51,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434684032] [2021-05-22 01:56:51,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434684032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:51,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:51,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583439790] [2021-05-22 01:56:51,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:51,565 INFO L87 Difference]: Start difference. First operand 1286 states and 4991 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:51,626 INFO L93 Difference]: Finished difference Result 2371 states and 8687 transitions. [2021-05-22 01:56:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:51,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:51,630 INFO L225 Difference]: With dead ends: 2371 [2021-05-22 01:56:51,630 INFO L226 Difference]: Without dead ends: 2172 [2021-05-22 01:56:51,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-05-22 01:56:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1262. [2021-05-22 01:56:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.888183980967486) internal successors, (4903), 1261 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4903 transitions. [2021-05-22 01:56:51,657 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4903 transitions. Word has length 25 [2021-05-22 01:56:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:51,657 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4903 transitions. [2021-05-22 01:56:51,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4903 transitions. [2021-05-22 01:56:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:51,659 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:51,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:51,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530 [2021-05-22 01:56:51,659 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1478470201, now seen corresponding path program 527 times [2021-05-22 01:56:51,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:51,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51436241] [2021-05-22 01:56:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:51,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51436241] [2021-05-22 01:56:51,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51436241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:51,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:51,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:51,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564284525] [2021-05-22 01:56:51,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:51,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:51,732 INFO L87 Difference]: Start difference. First operand 1262 states and 4903 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:51,797 INFO L93 Difference]: Finished difference Result 2511 states and 9124 transitions. [2021-05-22 01:56:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:51,801 INFO L225 Difference]: With dead ends: 2511 [2021-05-22 01:56:51,801 INFO L226 Difference]: Without dead ends: 2324 [2021-05-22 01:56:51,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-05-22 01:56:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1286. [2021-05-22 01:56:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.8747081712062257) internal successors, (4979), 1285 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4979 transitions. [2021-05-22 01:56:51,830 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4979 transitions. Word has length 25 [2021-05-22 01:56:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:51,830 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 4979 transitions. [2021-05-22 01:56:51,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4979 transitions. [2021-05-22 01:56:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:51,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:51,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:51,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531 [2021-05-22 01:56:51,832 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1271662235, now seen corresponding path program 528 times [2021-05-22 01:56:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:51,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779480150] [2021-05-22 01:56:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:51,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:51,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779480150] [2021-05-22 01:56:51,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779480150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:51,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:51,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862123154] [2021-05-22 01:56:51,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:51,905 INFO L87 Difference]: Start difference. First operand 1286 states and 4979 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:51,966 INFO L93 Difference]: Finished difference Result 2371 states and 8675 transitions. [2021-05-22 01:56:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:51,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:51,970 INFO L225 Difference]: With dead ends: 2371 [2021-05-22 01:56:51,970 INFO L226 Difference]: Without dead ends: 2156 [2021-05-22 01:56:51,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-05-22 01:56:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1246. [2021-05-22 01:56:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9044176706827307) internal successors, (4861), 1245 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4861 transitions. [2021-05-22 01:56:51,997 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4861 transitions. Word has length 25 [2021-05-22 01:56:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:51,997 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4861 transitions. [2021-05-22 01:56:51,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4861 transitions. [2021-05-22 01:56:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:51,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:51,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:51,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532 [2021-05-22 01:56:51,999 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -382263781, now seen corresponding path program 529 times [2021-05-22 01:56:51,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:51,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085502739] [2021-05-22 01:56:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085502739] [2021-05-22 01:56:52,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085502739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:52,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:52,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:52,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143925996] [2021-05-22 01:56:52,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:52,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:52,083 INFO L87 Difference]: Start difference. First operand 1246 states and 4861 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:52,138 INFO L93 Difference]: Finished difference Result 2475 states and 8984 transitions. [2021-05-22 01:56:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:52,142 INFO L225 Difference]: With dead ends: 2475 [2021-05-22 01:56:52,142 INFO L226 Difference]: Without dead ends: 2316 [2021-05-22 01:56:52,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-05-22 01:56:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1262. [2021-05-22 01:56:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.8929421094369547) internal successors, (4909), 1261 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4909 transitions. [2021-05-22 01:56:52,171 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4909 transitions. Word has length 25 [2021-05-22 01:56:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:52,171 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4909 transitions. [2021-05-22 01:56:52,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4909 transitions. [2021-05-22 01:56:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:52,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:52,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:52,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533 [2021-05-22 01:56:52,173 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:52,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1972198531, now seen corresponding path program 530 times [2021-05-22 01:56:52,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:52,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783754470] [2021-05-22 01:56:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:52,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783754470] [2021-05-22 01:56:52,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783754470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:52,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:52,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:52,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256556603] [2021-05-22 01:56:52,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:52,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:52,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:52,254 INFO L87 Difference]: Start difference. First operand 1262 states and 4909 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:52,321 INFO L93 Difference]: Finished difference Result 2505 states and 9077 transitions. [2021-05-22 01:56:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:52,326 INFO L225 Difference]: With dead ends: 2505 [2021-05-22 01:56:52,326 INFO L226 Difference]: Without dead ends: 2300 [2021-05-22 01:56:52,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-05-22 01:56:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1246. [2021-05-22 01:56:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.897991967871486) internal successors, (4853), 1245 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4853 transitions. [2021-05-22 01:56:52,353 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4853 transitions. Word has length 25 [2021-05-22 01:56:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:52,353 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4853 transitions. [2021-05-22 01:56:52,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4853 transitions. [2021-05-22 01:56:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:52,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:52,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:52,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534 [2021-05-22 01:56:52,355 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:52,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2070510053, now seen corresponding path program 531 times [2021-05-22 01:56:52,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:52,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395699516] [2021-05-22 01:56:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:52,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:52,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395699516] [2021-05-22 01:56:52,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395699516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:52,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:52,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:52,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167471280] [2021-05-22 01:56:52,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:52,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:52,444 INFO L87 Difference]: Start difference. First operand 1246 states and 4853 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:52,499 INFO L93 Difference]: Finished difference Result 2469 states and 8959 transitions. [2021-05-22 01:56:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:52,504 INFO L225 Difference]: With dead ends: 2469 [2021-05-22 01:56:52,504 INFO L226 Difference]: Without dead ends: 2310 [2021-05-22 01:56:52,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-22 01:56:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1262. [2021-05-22 01:56:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.88659793814433) internal successors, (4901), 1261 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4901 transitions. [2021-05-22 01:56:52,532 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4901 transitions. Word has length 25 [2021-05-22 01:56:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:52,532 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4901 transitions. [2021-05-22 01:56:52,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4901 transitions. [2021-05-22 01:56:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:52,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:52,533 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:52,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535 [2021-05-22 01:56:52,534 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash -390013413, now seen corresponding path program 532 times [2021-05-22 01:56:52,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:52,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588258480] [2021-05-22 01:56:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588258480] [2021-05-22 01:56:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588258480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:52,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:52,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:52,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631377623] [2021-05-22 01:56:52,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:52,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:52,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:52,616 INFO L87 Difference]: Start difference. First operand 1262 states and 4901 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:52,684 INFO L93 Difference]: Finished difference Result 2493 states and 9035 transitions. [2021-05-22 01:56:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:52,689 INFO L225 Difference]: With dead ends: 2493 [2021-05-22 01:56:52,689 INFO L226 Difference]: Without dead ends: 2294 [2021-05-22 01:56:52,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-05-22 01:56:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1246. [2021-05-22 01:56:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.891566265060241) internal successors, (4845), 1245 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4845 transitions. [2021-05-22 01:56:52,716 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4845 transitions. Word has length 25 [2021-05-22 01:56:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:52,716 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4845 transitions. [2021-05-22 01:56:52,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4845 transitions. [2021-05-22 01:56:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:52,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:52,718 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:52,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536 [2021-05-22 01:56:52,718 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash -653348099, now seen corresponding path program 533 times [2021-05-22 01:56:52,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:52,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495417928] [2021-05-22 01:56:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:52,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:52,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495417928] [2021-05-22 01:56:52,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495417928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:52,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:52,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548001743] [2021-05-22 01:56:52,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:52,800 INFO L87 Difference]: Start difference. First operand 1246 states and 4845 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:52,866 INFO L93 Difference]: Finished difference Result 2541 states and 9221 transitions. [2021-05-22 01:56:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:52,871 INFO L225 Difference]: With dead ends: 2541 [2021-05-22 01:56:52,871 INFO L226 Difference]: Without dead ends: 2352 [2021-05-22 01:56:52,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-05-22 01:56:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1274. [2021-05-22 01:56:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.875098193244305) internal successors, (4933), 1273 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4933 transitions. [2021-05-22 01:56:52,899 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4933 transitions. Word has length 25 [2021-05-22 01:56:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:52,899 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4933 transitions. [2021-05-22 01:56:52,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4933 transitions. [2021-05-22 01:56:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:52,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:52,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:52,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537 [2021-05-22 01:56:52,901 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2045492645, now seen corresponding path program 534 times [2021-05-22 01:56:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:52,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573436792] [2021-05-22 01:56:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:52,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:52,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573436792] [2021-05-22 01:56:52,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573436792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:52,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:52,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821914538] [2021-05-22 01:56:52,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:52,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:52,974 INFO L87 Difference]: Start difference. First operand 1274 states and 4933 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:53,042 INFO L93 Difference]: Finished difference Result 2535 states and 9176 transitions. [2021-05-22 01:56:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:53,046 INFO L225 Difference]: With dead ends: 2535 [2021-05-22 01:56:53,046 INFO L226 Difference]: Without dead ends: 2316 [2021-05-22 01:56:53,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-05-22 01:56:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1238. [2021-05-22 01:56:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.89733225545675) internal successors, (4821), 1237 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4821 transitions. [2021-05-22 01:56:53,073 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4821 transitions. Word has length 25 [2021-05-22 01:56:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:53,074 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4821 transitions. [2021-05-22 01:56:53,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4821 transitions. [2021-05-22 01:56:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:53,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:53,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:53,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538 [2021-05-22 01:56:53,075 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1889641977, now seen corresponding path program 535 times [2021-05-22 01:56:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191660736] [2021-05-22 01:56:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:53,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:53,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191660736] [2021-05-22 01:56:53,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191660736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:53,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:53,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:53,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099714322] [2021-05-22 01:56:53,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:53,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:53,166 INFO L87 Difference]: Start difference. First operand 1238 states and 4821 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:53,216 INFO L93 Difference]: Finished difference Result 2439 states and 8836 transitions. [2021-05-22 01:56:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:53,220 INFO L225 Difference]: With dead ends: 2439 [2021-05-22 01:56:53,220 INFO L226 Difference]: Without dead ends: 2280 [2021-05-22 01:56:53,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-05-22 01:56:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1238. [2021-05-22 01:56:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.8843977364591753) internal successors, (4805), 1237 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4805 transitions. [2021-05-22 01:56:53,250 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4805 transitions. Word has length 25 [2021-05-22 01:56:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:53,250 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4805 transitions. [2021-05-22 01:56:53,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4805 transitions. [2021-05-22 01:56:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:53,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:53,252 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:53,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539 [2021-05-22 01:56:53,252 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash 299707227, now seen corresponding path program 536 times [2021-05-22 01:56:53,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:53,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686699841] [2021-05-22 01:56:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:53,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:53,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686699841] [2021-05-22 01:56:53,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686699841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:53,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:53,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:53,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564794685] [2021-05-22 01:56:53,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:53,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:53,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:53,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:53,341 INFO L87 Difference]: Start difference. First operand 1238 states and 4805 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:53,409 INFO L93 Difference]: Finished difference Result 2469 states and 8929 transitions. [2021-05-22 01:56:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:53,414 INFO L225 Difference]: With dead ends: 2469 [2021-05-22 01:56:53,414 INFO L226 Difference]: Without dead ends: 2264 [2021-05-22 01:56:53,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-05-22 01:56:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1222. [2021-05-22 01:56:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.8894348894348894) internal successors, (4749), 1221 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4749 transitions. [2021-05-22 01:56:53,453 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4749 transitions. Word has length 25 [2021-05-22 01:56:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:53,453 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4749 transitions. [2021-05-22 01:56:53,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4749 transitions. [2021-05-22 01:56:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:53,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:53,455 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:53,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-05-22 01:56:53,455 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1035704805, now seen corresponding path program 537 times [2021-05-22 01:56:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:53,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133448538] [2021-05-22 01:56:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:53,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:53,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133448538] [2021-05-22 01:56:53,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133448538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:53,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:53,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:53,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002599495] [2021-05-22 01:56:53,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:53,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:53,538 INFO L87 Difference]: Start difference. First operand 1222 states and 4749 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:53,593 INFO L93 Difference]: Finished difference Result 2393 states and 8671 transitions. [2021-05-22 01:56:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:53,598 INFO L225 Difference]: With dead ends: 2393 [2021-05-22 01:56:53,598 INFO L226 Difference]: Without dead ends: 2234 [2021-05-22 01:56:53,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-05-22 01:56:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1238. [2021-05-22 01:56:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.877930476960388) internal successors, (4797), 1237 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4797 transitions. [2021-05-22 01:56:53,625 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4797 transitions. Word has length 25 [2021-05-22 01:56:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:53,625 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4797 transitions. [2021-05-22 01:56:53,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4797 transitions. [2021-05-22 01:56:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:53,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:53,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:53,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-05-22 01:56:53,627 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1316990491, now seen corresponding path program 538 times [2021-05-22 01:56:53,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:53,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882059108] [2021-05-22 01:56:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:53,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882059108] [2021-05-22 01:56:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882059108] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:53,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:53,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:53,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150207205] [2021-05-22 01:56:53,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:53,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:53,709 INFO L87 Difference]: Start difference. First operand 1238 states and 4797 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:53,778 INFO L93 Difference]: Finished difference Result 2281 states and 8334 transitions. [2021-05-22 01:56:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:53,782 INFO L225 Difference]: With dead ends: 2281 [2021-05-22 01:56:53,782 INFO L226 Difference]: Without dead ends: 2090 [2021-05-22 01:56:53,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-05-22 01:56:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1222. [2021-05-22 01:56:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.8828828828828827) internal successors, (4741), 1221 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4741 transitions. [2021-05-22 01:56:53,808 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4741 transitions. Word has length 25 [2021-05-22 01:56:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:53,808 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4741 transitions. [2021-05-22 01:56:53,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4741 transitions. [2021-05-22 01:56:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:53,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:53,809 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:53,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-05-22 01:56:53,810 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash 381457149, now seen corresponding path program 539 times [2021-05-22 01:56:53,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:53,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848443945] [2021-05-22 01:56:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:53,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848443945] [2021-05-22 01:56:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848443945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:53,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:53,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:53,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125030474] [2021-05-22 01:56:53,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:53,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:53,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:53,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:53,900 INFO L87 Difference]: Start difference. First operand 1222 states and 4741 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:53,968 INFO L93 Difference]: Finished difference Result 2431 states and 8808 transitions. [2021-05-22 01:56:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:53,972 INFO L225 Difference]: With dead ends: 2431 [2021-05-22 01:56:53,972 INFO L226 Difference]: Without dead ends: 2242 [2021-05-22 01:56:53,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-05-22 01:56:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1246. [2021-05-22 01:56:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.8690763052208834) internal successors, (4817), 1245 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4817 transitions. [2021-05-22 01:56:53,999 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4817 transitions. Word has length 25 [2021-05-22 01:56:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:53,999 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4817 transitions. [2021-05-22 01:56:53,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4817 transitions. [2021-05-22 01:56:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:54,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:54,001 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:54,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-05-22 01:56:54,001 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -359494949, now seen corresponding path program 540 times [2021-05-22 01:56:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116628231] [2021-05-22 01:56:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:54,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:54,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116628231] [2021-05-22 01:56:54,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116628231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:54,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:54,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:54,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498856014] [2021-05-22 01:56:54,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:54,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:54,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:54,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:54,095 INFO L87 Difference]: Start difference. First operand 1246 states and 4817 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:54,163 INFO L93 Difference]: Finished difference Result 2289 states and 8354 transitions. [2021-05-22 01:56:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:54,167 INFO L225 Difference]: With dead ends: 2289 [2021-05-22 01:56:54,167 INFO L226 Difference]: Without dead ends: 2082 [2021-05-22 01:56:54,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-05-22 01:56:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1214. [2021-05-22 01:56:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.8887056883759277) internal successors, (4717), 1213 states have internal predecessors, (4717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4717 transitions. [2021-05-22 01:56:54,193 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4717 transitions. Word has length 25 [2021-05-22 01:56:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:54,193 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 4717 transitions. [2021-05-22 01:56:54,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4717 transitions. [2021-05-22 01:56:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:54,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:54,194 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:54,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-05-22 01:56:54,194 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1680548325, now seen corresponding path program 541 times [2021-05-22 01:56:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:54,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268900885] [2021-05-22 01:56:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:54,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268900885] [2021-05-22 01:56:54,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268900885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:54,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:54,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:54,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700178549] [2021-05-22 01:56:54,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:54,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:54,269 INFO L87 Difference]: Start difference. First operand 1214 states and 4717 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:54,325 INFO L93 Difference]: Finished difference Result 2395 states and 8686 transitions. [2021-05-22 01:56:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:54,329 INFO L225 Difference]: With dead ends: 2395 [2021-05-22 01:56:54,329 INFO L226 Difference]: Without dead ends: 2236 [2021-05-22 01:56:54,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-05-22 01:56:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1238. [2021-05-22 01:56:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.8811641067097815) internal successors, (4801), 1237 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4801 transitions. [2021-05-22 01:56:54,356 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4801 transitions. Word has length 25 [2021-05-22 01:56:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:54,356 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4801 transitions. [2021-05-22 01:56:54,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4801 transitions. [2021-05-22 01:56:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:54,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:54,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:54,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-05-22 01:56:54,358 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash -51685, now seen corresponding path program 542 times [2021-05-22 01:56:54,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:54,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591039515] [2021-05-22 01:56:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:54,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:54,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591039515] [2021-05-22 01:56:54,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591039515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:54,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:54,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:54,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269594410] [2021-05-22 01:56:54,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:54,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:54,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:54,432 INFO L87 Difference]: Start difference. First operand 1238 states and 4801 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:54,500 INFO L93 Difference]: Finished difference Result 2419 states and 8762 transitions. [2021-05-22 01:56:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:54,505 INFO L225 Difference]: With dead ends: 2419 [2021-05-22 01:56:54,505 INFO L226 Difference]: Without dead ends: 2220 [2021-05-22 01:56:54,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-05-22 01:56:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1222. [2021-05-22 01:56:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.8861588861588863) internal successors, (4745), 1221 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4745 transitions. [2021-05-22 01:56:54,531 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4745 transitions. Word has length 25 [2021-05-22 01:56:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:54,531 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4745 transitions. [2021-05-22 01:56:54,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4745 transitions. [2021-05-22 01:56:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:54,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:54,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:54,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-05-22 01:56:54,532 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:54,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1767622009, now seen corresponding path program 543 times [2021-05-22 01:56:54,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:54,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948642197] [2021-05-22 01:56:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:54,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:54,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948642197] [2021-05-22 01:56:54,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948642197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:54,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:54,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:54,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343348857] [2021-05-22 01:56:54,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:54,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:54,608 INFO L87 Difference]: Start difference. First operand 1222 states and 4745 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:54,654 INFO L93 Difference]: Finished difference Result 2339 states and 8474 transitions. [2021-05-22 01:56:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:54,659 INFO L225 Difference]: With dead ends: 2339 [2021-05-22 01:56:54,659 INFO L226 Difference]: Without dead ends: 2180 [2021-05-22 01:56:54,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-05-22 01:56:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1238. [2021-05-22 01:56:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.8746968472109944) internal successors, (4793), 1237 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4793 transitions. [2021-05-22 01:56:54,687 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4793 transitions. Word has length 25 [2021-05-22 01:56:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:54,687 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4793 transitions. [2021-05-22 01:56:54,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4793 transitions. [2021-05-22 01:56:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:54,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:54,689 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:54,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547 [2021-05-22 01:56:54,689 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1885006309, now seen corresponding path program 544 times [2021-05-22 01:56:54,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:54,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757154807] [2021-05-22 01:56:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:54,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:54,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757154807] [2021-05-22 01:56:54,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757154807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:54,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:54,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:54,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026493833] [2021-05-22 01:56:54,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:54,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:54,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:54,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:54,766 INFO L87 Difference]: Start difference. First operand 1238 states and 4793 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:54,824 INFO L93 Difference]: Finished difference Result 2227 states and 8137 transitions. [2021-05-22 01:56:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:54,828 INFO L225 Difference]: With dead ends: 2227 [2021-05-22 01:56:54,828 INFO L226 Difference]: Without dead ends: 2036 [2021-05-22 01:56:54,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-05-22 01:56:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1222. [2021-05-22 01:56:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.8796068796068797) internal successors, (4737), 1221 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4737 transitions. [2021-05-22 01:56:54,854 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4737 transitions. Word has length 25 [2021-05-22 01:56:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:54,854 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4737 transitions. [2021-05-22 01:56:54,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4737 transitions. [2021-05-22 01:56:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:54,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:54,855 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:54,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548 [2021-05-22 01:56:54,855 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1787330075, now seen corresponding path program 545 times [2021-05-22 01:56:54,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:54,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476451594] [2021-05-22 01:56:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:54,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:54,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476451594] [2021-05-22 01:56:54,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476451594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:54,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:54,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010000223] [2021-05-22 01:56:54,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:54,931 INFO L87 Difference]: Start difference. First operand 1222 states and 4737 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:54,994 INFO L93 Difference]: Finished difference Result 2243 states and 8209 transitions. [2021-05-22 01:56:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:54,998 INFO L225 Difference]: With dead ends: 2243 [2021-05-22 01:56:54,998 INFO L226 Difference]: Without dead ends: 2060 [2021-05-22 01:56:54,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-05-22 01:56:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1246. [2021-05-22 01:56:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.865863453815261) internal successors, (4813), 1245 states have internal predecessors, (4813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4813 transitions. [2021-05-22 01:56:55,024 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4813 transitions. Word has length 25 [2021-05-22 01:56:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:55,024 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4813 transitions. [2021-05-22 01:56:55,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4813 transitions. [2021-05-22 01:56:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:55,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:55,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:55,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549 [2021-05-22 01:56:55,026 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash -256006919, now seen corresponding path program 546 times [2021-05-22 01:56:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:55,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839926160] [2021-05-22 01:56:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:55,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:55,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839926160] [2021-05-22 01:56:55,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839926160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:55,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:55,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:55,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392909049] [2021-05-22 01:56:55,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:55,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:55,101 INFO L87 Difference]: Start difference. First operand 1246 states and 4813 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:55,157 INFO L93 Difference]: Finished difference Result 2059 states and 7596 transitions. [2021-05-22 01:56:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:55,161 INFO L225 Difference]: With dead ends: 2059 [2021-05-22 01:56:55,161 INFO L226 Difference]: Without dead ends: 1852 [2021-05-22 01:56:55,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-05-22 01:56:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1214. [2021-05-22 01:56:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.8854080791426218) internal successors, (4713), 1213 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4713 transitions. [2021-05-22 01:56:55,186 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4713 transitions. Word has length 25 [2021-05-22 01:56:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:55,186 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 4713 transitions. [2021-05-22 01:56:55,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4713 transitions. [2021-05-22 01:56:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:55,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:55,187 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:55,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550 [2021-05-22 01:56:55,187 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -956444035, now seen corresponding path program 547 times [2021-05-22 01:56:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:55,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191414303] [2021-05-22 01:56:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:55,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191414303] [2021-05-22 01:56:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191414303] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:55,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:55,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:55,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895313490] [2021-05-22 01:56:55,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:55,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:55,261 INFO L87 Difference]: Start difference. First operand 1214 states and 4713 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:55,319 INFO L93 Difference]: Finished difference Result 2479 states and 9008 transitions. [2021-05-22 01:56:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:55,323 INFO L225 Difference]: With dead ends: 2479 [2021-05-22 01:56:55,323 INFO L226 Difference]: Without dead ends: 2290 [2021-05-22 01:56:55,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-05-22 01:56:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1254. [2021-05-22 01:56:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 3.8762968874700716) internal successors, (4857), 1253 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 4857 transitions. [2021-05-22 01:56:55,350 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 4857 transitions. Word has length 25 [2021-05-22 01:56:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:55,350 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 4857 transitions. [2021-05-22 01:56:55,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 4857 transitions. [2021-05-22 01:56:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:55,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:55,352 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:55,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551 [2021-05-22 01:56:55,352 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1946378715, now seen corresponding path program 548 times [2021-05-22 01:56:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:55,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696570575] [2021-05-22 01:56:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:55,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:55,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696570575] [2021-05-22 01:56:55,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696570575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:55,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:55,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:55,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749924495] [2021-05-22 01:56:55,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:55,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:55,426 INFO L87 Difference]: Start difference. First operand 1254 states and 4857 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:55,483 INFO L93 Difference]: Finished difference Result 2473 states and 8963 transitions. [2021-05-22 01:56:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:55,487 INFO L225 Difference]: With dead ends: 2473 [2021-05-22 01:56:55,487 INFO L226 Difference]: Without dead ends: 2262 [2021-05-22 01:56:55,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-05-22 01:56:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1226. [2021-05-22 01:56:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.883265306122449) internal successors, (4757), 1225 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 4757 transitions. [2021-05-22 01:56:55,514 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 4757 transitions. Word has length 25 [2021-05-22 01:56:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:55,514 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 4757 transitions. [2021-05-22 01:56:55,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 4757 transitions. [2021-05-22 01:56:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:55,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:55,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:55,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552 [2021-05-22 01:56:55,515 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:55,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1803240997, now seen corresponding path program 549 times [2021-05-22 01:56:55,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:55,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899911880] [2021-05-22 01:56:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:55,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:55,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899911880] [2021-05-22 01:56:55,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899911880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:55,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:55,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668583002] [2021-05-22 01:56:55,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:55,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:55,619 INFO L87 Difference]: Start difference. First operand 1226 states and 4757 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:55,675 INFO L93 Difference]: Finished difference Result 2381 states and 8631 transitions. [2021-05-22 01:56:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:55,680 INFO L225 Difference]: With dead ends: 2381 [2021-05-22 01:56:55,680 INFO L226 Difference]: Without dead ends: 2192 [2021-05-22 01:56:55,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-05-22 01:56:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1250. [2021-05-22 01:56:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.8694955964771816) internal successors, (4833), 1249 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4833 transitions. [2021-05-22 01:56:55,706 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4833 transitions. Word has length 25 [2021-05-22 01:56:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:55,706 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4833 transitions. [2021-05-22 01:56:55,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4833 transitions. [2021-05-22 01:56:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:55,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:55,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:55,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553 [2021-05-22 01:56:55,708 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash 40417883, now seen corresponding path program 550 times [2021-05-22 01:56:55,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:55,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220701816] [2021-05-22 01:56:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:55,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220701816] [2021-05-22 01:56:55,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220701816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:55,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:55,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:55,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88420880] [2021-05-22 01:56:55,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:55,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:55,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:55,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:55,791 INFO L87 Difference]: Start difference. First operand 1250 states and 4833 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:55,851 INFO L93 Difference]: Finished difference Result 2239 states and 8177 transitions. [2021-05-22 01:56:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:55,855 INFO L225 Difference]: With dead ends: 2239 [2021-05-22 01:56:55,855 INFO L226 Difference]: Without dead ends: 2040 [2021-05-22 01:56:55,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-05-22 01:56:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1226. [2021-05-22 01:56:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.873469387755102) internal successors, (4745), 1225 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 4745 transitions. [2021-05-22 01:56:55,881 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 4745 transitions. Word has length 25 [2021-05-22 01:56:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:55,881 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 4745 transitions. [2021-05-22 01:56:55,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 4745 transitions. [2021-05-22 01:56:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:55,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:55,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:55,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable554 [2021-05-22 01:56:55,882 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:55,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1438983623, now seen corresponding path program 551 times [2021-05-22 01:56:55,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:55,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938227966] [2021-05-22 01:56:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:55,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:55,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938227966] [2021-05-22 01:56:55,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938227966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:55,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:55,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:55,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401898269] [2021-05-22 01:56:55,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:55,955 INFO L87 Difference]: Start difference. First operand 1226 states and 4745 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,011 INFO L93 Difference]: Finished difference Result 2247 states and 8217 transitions. [2021-05-22 01:56:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,015 INFO L225 Difference]: With dead ends: 2247 [2021-05-22 01:56:56,015 INFO L226 Difference]: Without dead ends: 2064 [2021-05-22 01:56:56,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-05-22 01:56:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1250. [2021-05-22 01:56:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.8598879103282626) internal successors, (4821), 1249 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4821 transitions. [2021-05-22 01:56:56,041 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4821 transitions. Word has length 25 [2021-05-22 01:56:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:56,041 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4821 transitions. [2021-05-22 01:56:56,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4821 transitions. [2021-05-22 01:56:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:56,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:56,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:56,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555 [2021-05-22 01:56:56,042 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:56,043 INFO L82 PathProgramCache]: Analyzing trace with hash -357920997, now seen corresponding path program 552 times [2021-05-22 01:56:56,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:56,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307612930] [2021-05-22 01:56:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:56,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:56,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307612930] [2021-05-22 01:56:56,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307612930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:56,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:56,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:56,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818004897] [2021-05-22 01:56:56,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:56,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:56,116 INFO L87 Difference]: Start difference. First operand 1250 states and 4821 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,171 INFO L93 Difference]: Finished difference Result 2063 states and 7604 transitions. [2021-05-22 01:56:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,175 INFO L225 Difference]: With dead ends: 2063 [2021-05-22 01:56:56,175 INFO L226 Difference]: Without dead ends: 1848 [2021-05-22 01:56:56,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2021-05-22 01:56:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1210. [2021-05-22 01:56:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.889991728701406) internal successors, (4703), 1209 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4703 transitions. [2021-05-22 01:56:56,200 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4703 transitions. Word has length 25 [2021-05-22 01:56:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:56,200 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4703 transitions. [2021-05-22 01:56:56,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4703 transitions. [2021-05-22 01:56:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:56,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:56,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:56,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556 [2021-05-22 01:56:56,201 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash -302743043, now seen corresponding path program 553 times [2021-05-22 01:56:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:56,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718525013] [2021-05-22 01:56:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:56,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:56,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718525013] [2021-05-22 01:56:56,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718525013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:56,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:56,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:56,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954170263] [2021-05-22 01:56:56,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:56,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:56,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:56,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:56,286 INFO L87 Difference]: Start difference. First operand 1210 states and 4703 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,335 INFO L93 Difference]: Finished difference Result 2385 states and 8635 transitions. [2021-05-22 01:56:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,339 INFO L225 Difference]: With dead ends: 2385 [2021-05-22 01:56:56,339 INFO L226 Difference]: Without dead ends: 2226 [2021-05-22 01:56:56,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-22 01:56:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1226. [2021-05-22 01:56:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.8783673469387754) internal successors, (4751), 1225 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 4751 transitions. [2021-05-22 01:56:56,366 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 4751 transitions. Word has length 25 [2021-05-22 01:56:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:56,366 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 4751 transitions. [2021-05-22 01:56:56,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 4751 transitions. [2021-05-22 01:56:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:56,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:56,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:56,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557 [2021-05-22 01:56:56,368 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:56,368 INFO L82 PathProgramCache]: Analyzing trace with hash 705554941, now seen corresponding path program 554 times [2021-05-22 01:56:56,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:56,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173341136] [2021-05-22 01:56:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:56,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:56,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173341136] [2021-05-22 01:56:56,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173341136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:56,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:56,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:56,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49630090] [2021-05-22 01:56:56,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:56,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:56,453 INFO L87 Difference]: Start difference. First operand 1226 states and 4751 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,510 INFO L93 Difference]: Finished difference Result 2413 states and 8723 transitions. [2021-05-22 01:56:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,514 INFO L225 Difference]: With dead ends: 2413 [2021-05-22 01:56:56,514 INFO L226 Difference]: Without dead ends: 2210 [2021-05-22 01:56:56,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-05-22 01:56:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1210. [2021-05-22 01:56:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.8833746898263026) internal successors, (4695), 1209 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4695 transitions. [2021-05-22 01:56:56,540 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4695 transitions. Word has length 25 [2021-05-22 01:56:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:56,540 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4695 transitions. [2021-05-22 01:56:56,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4695 transitions. [2021-05-22 01:56:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:56,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:56,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:56,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558 [2021-05-22 01:56:56,541 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1149540005, now seen corresponding path program 555 times [2021-05-22 01:56:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479238974] [2021-05-22 01:56:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:56,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:56,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479238974] [2021-05-22 01:56:56,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479238974] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:56,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:56,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:56,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601525042] [2021-05-22 01:56:56,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:56,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:56,616 INFO L87 Difference]: Start difference. First operand 1210 states and 4695 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,660 INFO L93 Difference]: Finished difference Result 2381 states and 8615 transitions. [2021-05-22 01:56:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,664 INFO L225 Difference]: With dead ends: 2381 [2021-05-22 01:56:56,664 INFO L226 Difference]: Without dead ends: 2222 [2021-05-22 01:56:56,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-05-22 01:56:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1226. [2021-05-22 01:56:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.8718367346938773) internal successors, (4743), 1225 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 4743 transitions. [2021-05-22 01:56:56,689 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 4743 transitions. Word has length 25 [2021-05-22 01:56:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:56,690 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 4743 transitions. [2021-05-22 01:56:56,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 4743 transitions. [2021-05-22 01:56:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:56,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:56,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:56,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559 [2021-05-22 01:56:56,691 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:56,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1179399683, now seen corresponding path program 556 times [2021-05-22 01:56:56,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:56,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351835299] [2021-05-22 01:56:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:56,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:56,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351835299] [2021-05-22 01:56:56,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351835299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:56,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:56,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:56,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070884312] [2021-05-22 01:56:56,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:56,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:56,766 INFO L87 Difference]: Start difference. First operand 1226 states and 4743 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,825 INFO L93 Difference]: Finished difference Result 2405 states and 8691 transitions. [2021-05-22 01:56:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,829 INFO L225 Difference]: With dead ends: 2405 [2021-05-22 01:56:56,829 INFO L226 Difference]: Without dead ends: 2206 [2021-05-22 01:56:56,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-05-22 01:56:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 1210. [2021-05-22 01:56:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.876757650951199) internal successors, (4687), 1209 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4687 transitions. [2021-05-22 01:56:56,855 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4687 transitions. Word has length 25 [2021-05-22 01:56:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:56,855 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4687 transitions. [2021-05-22 01:56:56,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4687 transitions. [2021-05-22 01:56:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:56,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:56,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:56,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560 [2021-05-22 01:56:56,856 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash 755122685, now seen corresponding path program 557 times [2021-05-22 01:56:56,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:56,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772339510] [2021-05-22 01:56:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:56,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:56,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772339510] [2021-05-22 01:56:56,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772339510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:56,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:56,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:56,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40188409] [2021-05-22 01:56:56,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:56,931 INFO L87 Difference]: Start difference. First operand 1210 states and 4687 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:56,988 INFO L93 Difference]: Finished difference Result 2449 states and 8867 transitions. [2021-05-22 01:56:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:56,992 INFO L225 Difference]: With dead ends: 2449 [2021-05-22 01:56:56,992 INFO L226 Difference]: Without dead ends: 2262 [2021-05-22 01:56:56,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-05-22 01:56:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1238. [2021-05-22 01:56:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.860145513338723) internal successors, (4775), 1237 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4775 transitions. [2021-05-22 01:56:57,018 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4775 transitions. Word has length 25 [2021-05-22 01:56:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:57,018 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4775 transitions. [2021-05-22 01:56:57,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4775 transitions. [2021-05-22 01:56:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:57,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:57,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:57,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561 [2021-05-22 01:56:57,020 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1288214309, now seen corresponding path program 558 times [2021-05-22 01:56:57,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:57,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053593344] [2021-05-22 01:56:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:57,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:57,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053593344] [2021-05-22 01:56:57,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053593344] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:57,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:57,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572468010] [2021-05-22 01:56:57,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:57,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:57,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:57,094 INFO L87 Difference]: Start difference. First operand 1238 states and 4775 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:57,154 INFO L93 Difference]: Finished difference Result 2445 states and 8827 transitions. [2021-05-22 01:56:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:57,158 INFO L225 Difference]: With dead ends: 2445 [2021-05-22 01:56:57,158 INFO L226 Difference]: Without dead ends: 2226 [2021-05-22 01:56:57,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-22 01:56:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1202. [2021-05-22 01:56:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.8825978351373855) internal successors, (4663), 1201 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 4663 transitions. [2021-05-22 01:56:57,184 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 4663 transitions. Word has length 25 [2021-05-22 01:56:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:57,184 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 4663 transitions. [2021-05-22 01:56:57,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 4663 transitions. [2021-05-22 01:56:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:57,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:57,185 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:57,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562 [2021-05-22 01:56:57,186 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1969162715, now seen corresponding path program 559 times [2021-05-22 01:56:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:57,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177265207] [2021-05-22 01:56:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:57,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177265207] [2021-05-22 01:56:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177265207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:57,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:57,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:57,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500808887] [2021-05-22 01:56:57,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:57,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:57,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:57,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:57,270 INFO L87 Difference]: Start difference. First operand 1202 states and 4663 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:57,316 INFO L93 Difference]: Finished difference Result 2349 states and 8487 transitions. [2021-05-22 01:56:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:57,320 INFO L225 Difference]: With dead ends: 2349 [2021-05-22 01:56:57,320 INFO L226 Difference]: Without dead ends: 2190 [2021-05-22 01:56:57,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-05-22 01:56:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1202. [2021-05-22 01:56:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.869275603663614) internal successors, (4647), 1201 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 4647 transitions. [2021-05-22 01:56:57,346 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 4647 transitions. Word has length 25 [2021-05-22 01:56:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:57,346 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 4647 transitions. [2021-05-22 01:56:57,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 4647 transitions. [2021-05-22 01:56:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:57,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:57,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:57,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563 [2021-05-22 01:56:57,349 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1317506597, now seen corresponding path program 560 times [2021-05-22 01:56:57,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:57,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655469681] [2021-05-22 01:56:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:57,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:57,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655469681] [2021-05-22 01:56:57,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655469681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:57,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:57,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:57,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158082688] [2021-05-22 01:56:57,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:57,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:57,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:57,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:57,447 INFO L87 Difference]: Start difference. First operand 1202 states and 4647 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:57,509 INFO L93 Difference]: Finished difference Result 2377 states and 8575 transitions. [2021-05-22 01:56:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:57,513 INFO L225 Difference]: With dead ends: 2377 [2021-05-22 01:56:57,513 INFO L226 Difference]: Without dead ends: 2174 [2021-05-22 01:56:57,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-05-22 01:56:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1186. [2021-05-22 01:56:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 3.8742616033755275) internal successors, (4591), 1185 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 4591 transitions. [2021-05-22 01:56:57,539 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 4591 transitions. Word has length 25 [2021-05-22 01:56:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:57,539 INFO L482 AbstractCegarLoop]: Abstraction has 1186 states and 4591 transitions. [2021-05-22 01:56:57,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 4591 transitions. [2021-05-22 01:56:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:57,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:57,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:57,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-05-22 01:56:57,541 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1173135835, now seen corresponding path program 561 times [2021-05-22 01:56:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:57,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921270075] [2021-05-22 01:56:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:57,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:57,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921270075] [2021-05-22 01:56:57,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921270075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:57,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:57,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:57,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837467727] [2021-05-22 01:56:57,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:57,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:57,617 INFO L87 Difference]: Start difference. First operand 1186 states and 4591 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:57,662 INFO L93 Difference]: Finished difference Result 2305 states and 8327 transitions. [2021-05-22 01:56:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:57,666 INFO L225 Difference]: With dead ends: 2305 [2021-05-22 01:56:57,666 INFO L226 Difference]: Without dead ends: 2146 [2021-05-22 01:56:57,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-05-22 01:56:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1202. [2021-05-22 01:56:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.8626144879267277) internal successors, (4639), 1201 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 4639 transitions. [2021-05-22 01:56:57,691 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 4639 transitions. Word has length 25 [2021-05-22 01:56:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:57,691 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 4639 transitions. [2021-05-22 01:56:57,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 4639 transitions. [2021-05-22 01:56:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:57,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:57,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:57,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-05-22 01:56:57,693 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash 527604221, now seen corresponding path program 562 times [2021-05-22 01:56:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925977970] [2021-05-22 01:56:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:57,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:57,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925977970] [2021-05-22 01:56:57,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925977970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:57,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:57,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:57,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973501199] [2021-05-22 01:56:57,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:57,790 INFO L87 Difference]: Start difference. First operand 1202 states and 4639 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:57,849 INFO L93 Difference]: Finished difference Result 2193 states and 7990 transitions. [2021-05-22 01:56:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:57,853 INFO L225 Difference]: With dead ends: 2193 [2021-05-22 01:56:57,853 INFO L226 Difference]: Without dead ends: 2002 [2021-05-22 01:56:57,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-05-22 01:56:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1186. [2021-05-22 01:56:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 3.8675105485232066) internal successors, (4583), 1185 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 4583 transitions. [2021-05-22 01:56:57,877 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 4583 transitions. Word has length 25 [2021-05-22 01:56:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:57,877 INFO L482 AbstractCegarLoop]: Abstraction has 1186 states and 4583 transitions. [2021-05-22 01:56:57,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 4583 transitions. [2021-05-22 01:56:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:57,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:57,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:57,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566 [2021-05-22 01:56:57,879 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:57,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1789927933, now seen corresponding path program 563 times [2021-05-22 01:56:57,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:57,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609889386] [2021-05-22 01:56:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:57,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609889386] [2021-05-22 01:56:57,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609889386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:57,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:57,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400354808] [2021-05-22 01:56:57,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:57,952 INFO L87 Difference]: Start difference. First operand 1186 states and 4583 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,009 INFO L93 Difference]: Finished difference Result 2341 states and 8459 transitions. [2021-05-22 01:56:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,013 INFO L225 Difference]: With dead ends: 2341 [2021-05-22 01:56:58,013 INFO L226 Difference]: Without dead ends: 2154 [2021-05-22 01:56:58,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-05-22 01:56:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1210. [2021-05-22 01:56:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.8535980148883375) internal successors, (4659), 1209 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4659 transitions. [2021-05-22 01:56:58,038 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4659 transitions. Word has length 25 [2021-05-22 01:56:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,038 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4659 transitions. [2021-05-22 01:56:58,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4659 transitions. [2021-05-22 01:56:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567 [2021-05-22 01:56:58,039 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash 397783387, now seen corresponding path program 564 times [2021-05-22 01:56:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121661546] [2021-05-22 01:56:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:58,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121661546] [2021-05-22 01:56:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121661546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:58,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:58,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:58,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024511288] [2021-05-22 01:56:58,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:58,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:58,113 INFO L87 Difference]: Start difference. First operand 1210 states and 4659 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,171 INFO L93 Difference]: Finished difference Result 2201 states and 8010 transitions. [2021-05-22 01:56:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,175 INFO L225 Difference]: With dead ends: 2201 [2021-05-22 01:56:58,175 INFO L226 Difference]: Without dead ends: 1994 [2021-05-22 01:56:58,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-05-22 01:56:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1178. [2021-05-22 01:56:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.873406966864911) internal successors, (4559), 1177 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 4559 transitions. [2021-05-22 01:56:58,199 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 4559 transitions. Word has length 25 [2021-05-22 01:56:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,199 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 4559 transitions. [2021-05-22 01:56:58,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 4559 transitions. [2021-05-22 01:56:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568 [2021-05-22 01:56:58,201 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1112414649, now seen corresponding path program 565 times [2021-05-22 01:56:58,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149656206] [2021-05-22 01:56:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:58,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149656206] [2021-05-22 01:56:58,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149656206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:58,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:58,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:58,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102949299] [2021-05-22 01:56:58,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:58,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:58,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:58,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:58,275 INFO L87 Difference]: Start difference. First operand 1178 states and 4559 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,321 INFO L93 Difference]: Finished difference Result 2285 states and 8247 transitions. [2021-05-22 01:56:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,325 INFO L225 Difference]: With dead ends: 2285 [2021-05-22 01:56:58,325 INFO L226 Difference]: Without dead ends: 2126 [2021-05-22 01:56:58,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-05-22 01:56:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1178. [2021-05-22 01:56:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.8598130841121496) internal successors, (4543), 1177 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 4543 transitions. [2021-05-22 01:56:58,350 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 4543 transitions. Word has length 25 [2021-05-22 01:56:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,350 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 4543 transitions. [2021-05-22 01:56:58,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 4543 transitions. [2021-05-22 01:56:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,352 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569 [2021-05-22 01:56:58,352 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1082554971, now seen corresponding path program 566 times [2021-05-22 01:56:58,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305561773] [2021-05-22 01:56:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305561773] [2021-05-22 01:56:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305561773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:58,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:58,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28961497] [2021-05-22 01:56:58,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:58,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:58,426 INFO L87 Difference]: Start difference. First operand 1178 states and 4543 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,485 INFO L93 Difference]: Finished difference Result 2309 states and 8323 transitions. [2021-05-22 01:56:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,489 INFO L225 Difference]: With dead ends: 2309 [2021-05-22 01:56:58,489 INFO L226 Difference]: Without dead ends: 2110 [2021-05-22 01:56:58,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-05-22 01:56:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1162. [2021-05-22 01:56:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.8647717484926787) internal successors, (4487), 1161 states have internal predecessors, (4487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 4487 transitions. [2021-05-22 01:56:58,513 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 4487 transitions. Word has length 25 [2021-05-22 01:56:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,514 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 4487 transitions. [2021-05-22 01:56:58,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 4487 transitions. [2021-05-22 01:56:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570 [2021-05-22 01:56:58,515 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash 631512603, now seen corresponding path program 567 times [2021-05-22 01:56:58,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517478686] [2021-05-22 01:56:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:58,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517478686] [2021-05-22 01:56:58,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517478686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:58,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:58,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:58,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087257015] [2021-05-22 01:56:58,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:58,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:58,591 INFO L87 Difference]: Start difference. First operand 1162 states and 4487 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,640 INFO L93 Difference]: Finished difference Result 2229 states and 8035 transitions. [2021-05-22 01:56:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,644 INFO L225 Difference]: With dead ends: 2229 [2021-05-22 01:56:58,644 INFO L226 Difference]: Without dead ends: 2070 [2021-05-22 01:56:58,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-05-22 01:56:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1130. [2021-05-22 01:56:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.8609388839681134) internal successors, (4359), 1129 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 4359 transitions. [2021-05-22 01:56:58,667 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 4359 transitions. Word has length 25 [2021-05-22 01:56:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,667 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 4359 transitions. [2021-05-22 01:56:58,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 4359 transitions. [2021-05-22 01:56:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,669 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,669 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571 [2021-05-22 01:56:58,669 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1495457317, now seen corresponding path program 568 times [2021-05-22 01:56:58,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686327700] [2021-05-22 01:56:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:58,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:58,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686327700] [2021-05-22 01:56:58,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686327700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:58,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:58,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:58,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036824121] [2021-05-22 01:56:58,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:58,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:58,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:58,744 INFO L87 Difference]: Start difference. First operand 1130 states and 4359 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,803 INFO L93 Difference]: Finished difference Result 2117 states and 7698 transitions. [2021-05-22 01:56:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,807 INFO L225 Difference]: With dead ends: 2117 [2021-05-22 01:56:58,807 INFO L226 Difference]: Without dead ends: 1926 [2021-05-22 01:56:58,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-22 01:56:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1114. [2021-05-22 01:56:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.866127583108715) internal successors, (4303), 1113 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4303 transitions. [2021-05-22 01:56:58,829 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4303 transitions. Word has length 25 [2021-05-22 01:56:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,829 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4303 transitions. [2021-05-22 01:56:58,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4303 transitions. [2021-05-22 01:56:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572 [2021-05-22 01:56:58,830 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash -798035459, now seen corresponding path program 569 times [2021-05-22 01:56:58,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557465851] [2021-05-22 01:56:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:58,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:58,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557465851] [2021-05-22 01:56:58,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557465851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:58,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:58,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:58,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027301049] [2021-05-22 01:56:58,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:58,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:58,905 INFO L87 Difference]: Start difference. First operand 1114 states and 4303 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:58,961 INFO L93 Difference]: Finished difference Result 2133 states and 7770 transitions. [2021-05-22 01:56:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:58,965 INFO L225 Difference]: With dead ends: 2133 [2021-05-22 01:56:58,965 INFO L226 Difference]: Without dead ends: 1950 [2021-05-22 01:56:58,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-05-22 01:56:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1138. [2021-05-22 01:56:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.851363236587511) internal successors, (4379), 1137 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 4379 transitions. [2021-05-22 01:56:58,987 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 4379 transitions. Word has length 25 [2021-05-22 01:56:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:58,987 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 4379 transitions. [2021-05-22 01:56:58,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 4379 transitions. [2021-05-22 01:56:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:58,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:58,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:58,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable573 [2021-05-22 01:56:58,989 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1453594843, now seen corresponding path program 570 times [2021-05-22 01:56:58,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:58,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905665849] [2021-05-22 01:56:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:59,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905665849] [2021-05-22 01:56:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905665849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:59,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:59,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532259224] [2021-05-22 01:56:59,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:59,064 INFO L87 Difference]: Start difference. First operand 1138 states and 4379 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:59,120 INFO L93 Difference]: Finished difference Result 1949 states and 7157 transitions. [2021-05-22 01:56:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:59,123 INFO L225 Difference]: With dead ends: 1949 [2021-05-22 01:56:59,123 INFO L226 Difference]: Without dead ends: 1742 [2021-05-22 01:56:59,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-05-22 01:56:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1106. [2021-05-22 01:56:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 3.872398190045249) internal successors, (4279), 1105 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 4279 transitions. [2021-05-22 01:56:59,145 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 4279 transitions. Word has length 25 [2021-05-22 01:56:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:59,145 INFO L482 AbstractCegarLoop]: Abstraction has 1106 states and 4279 transitions. [2021-05-22 01:56:59,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 4279 transitions. [2021-05-22 01:56:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:59,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:59,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:59,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574 [2021-05-22 01:56:59,146 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash 442075645, now seen corresponding path program 571 times [2021-05-22 01:56:59,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:59,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987896374] [2021-05-22 01:56:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:59,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:59,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987896374] [2021-05-22 01:56:59,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987896374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:59,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:59,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:59,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351861088] [2021-05-22 01:56:59,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:59,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:59,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:59,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:59,221 INFO L87 Difference]: Start difference. First operand 1106 states and 4279 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:59,278 INFO L93 Difference]: Finished difference Result 2181 states and 7970 transitions. [2021-05-22 01:56:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:59,281 INFO L225 Difference]: With dead ends: 2181 [2021-05-22 01:56:59,281 INFO L226 Difference]: Without dead ends: 1994 [2021-05-22 01:56:59,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-05-22 01:56:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1146. [2021-05-22 01:56:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.862882096069869) internal successors, (4423), 1145 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 4423 transitions. [2021-05-22 01:56:59,304 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 4423 transitions. Word has length 25 [2021-05-22 01:56:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:59,304 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 4423 transitions. [2021-05-22 01:56:59,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 4423 transitions. [2021-05-22 01:56:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:59,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:59,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:59,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable575 [2021-05-22 01:56:59,306 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1601261349, now seen corresponding path program 572 times [2021-05-22 01:56:59,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:59,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567105079] [2021-05-22 01:56:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:59,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:59,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567105079] [2021-05-22 01:56:59,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567105079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:59,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:59,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:59,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692844125] [2021-05-22 01:56:59,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:59,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:59,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:59,381 INFO L87 Difference]: Start difference. First operand 1146 states and 4423 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:59,437 INFO L93 Difference]: Finished difference Result 2177 states and 7930 transitions. [2021-05-22 01:56:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:59,441 INFO L225 Difference]: With dead ends: 2177 [2021-05-22 01:56:59,441 INFO L226 Difference]: Without dead ends: 1966 [2021-05-22 01:56:59,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-05-22 01:56:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1118. [2021-05-22 01:56:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.8701880035810206) internal successors, (4323), 1117 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4323 transitions. [2021-05-22 01:56:59,463 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4323 transitions. Word has length 25 [2021-05-22 01:56:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4323 transitions. [2021-05-22 01:56:59,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4323 transitions. [2021-05-22 01:56:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:59,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:59,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:59,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable576 [2021-05-22 01:56:59,465 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash -404721317, now seen corresponding path program 573 times [2021-05-22 01:56:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:59,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064945664] [2021-05-22 01:56:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:59,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:59,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064945664] [2021-05-22 01:56:59,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064945664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:59,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:59,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:59,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950432614] [2021-05-22 01:56:59,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:59,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:59,539 INFO L87 Difference]: Start difference. First operand 1118 states and 4323 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:59,601 INFO L93 Difference]: Finished difference Result 2093 states and 7626 transitions. [2021-05-22 01:56:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:59,605 INFO L225 Difference]: With dead ends: 2093 [2021-05-22 01:56:59,605 INFO L226 Difference]: Without dead ends: 1906 [2021-05-22 01:56:59,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-05-22 01:56:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1142. [2021-05-22 01:56:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.855390008764242) internal successors, (4399), 1141 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4399 transitions. [2021-05-22 01:56:59,626 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4399 transitions. Word has length 25 [2021-05-22 01:56:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:59,627 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 4399 transitions. [2021-05-22 01:56:59,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4399 transitions. [2021-05-22 01:56:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:59,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:59,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577 [2021-05-22 01:56:59,628 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash 787745115, now seen corresponding path program 574 times [2021-05-22 01:56:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:59,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582864984] [2021-05-22 01:56:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:59,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:59,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582864984] [2021-05-22 01:56:59,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582864984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:59,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:59,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580762900] [2021-05-22 01:56:59,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:59,704 INFO L87 Difference]: Start difference. First operand 1142 states and 4399 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:59,764 INFO L93 Difference]: Finished difference Result 1953 states and 7177 transitions. [2021-05-22 01:56:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:59,768 INFO L225 Difference]: With dead ends: 1953 [2021-05-22 01:56:59,768 INFO L226 Difference]: Without dead ends: 1754 [2021-05-22 01:56:59,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-05-22 01:56:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1118. [2021-05-22 01:56:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.8594449418084156) internal successors, (4311), 1117 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4311 transitions. [2021-05-22 01:56:59,789 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4311 transitions. Word has length 25 [2021-05-22 01:56:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:59,789 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4311 transitions. [2021-05-22 01:56:59,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4311 transitions. [2021-05-22 01:56:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:59,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:59,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:59,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-05-22 01:56:59,791 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 577626297, now seen corresponding path program 575 times [2021-05-22 01:56:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:59,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883029802] [2021-05-22 01:56:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:56:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:56:59,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:56:59,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883029802] [2021-05-22 01:56:59,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883029802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:56:59,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:56:59,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:56:59,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491531717] [2021-05-22 01:56:59,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:56:59,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:56:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:56:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:56:59,879 INFO L87 Difference]: Start difference. First operand 1118 states and 4311 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:56:59,940 INFO L93 Difference]: Finished difference Result 1881 states and 6913 transitions. [2021-05-22 01:56:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:56:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:56:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:56:59,943 INFO L225 Difference]: With dead ends: 1881 [2021-05-22 01:56:59,943 INFO L226 Difference]: Without dead ends: 1698 [2021-05-22 01:56:59,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:56:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-05-22 01:56:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1142. [2021-05-22 01:56:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.8448729184925505) internal successors, (4387), 1141 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4387 transitions. [2021-05-22 01:56:59,964 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4387 transitions. Word has length 25 [2021-05-22 01:56:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:56:59,964 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 4387 transitions. [2021-05-22 01:56:59,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:56:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4387 transitions. [2021-05-22 01:56:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:56:59,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:56:59,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:56:59,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-05-22 01:56:59,966 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:56:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:56:59,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1658688923, now seen corresponding path program 576 times [2021-05-22 01:56:59,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:56:59,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746299855] [2021-05-22 01:56:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:56:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746299855] [2021-05-22 01:57:00,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746299855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629554622] [2021-05-22 01:57:00,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,039 INFO L87 Difference]: Start difference. First operand 1142 states and 4387 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:00,091 INFO L93 Difference]: Finished difference Result 1697 states and 6300 transitions. [2021-05-22 01:57:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:00,094 INFO L225 Difference]: With dead ends: 1697 [2021-05-22 01:57:00,094 INFO L226 Difference]: Without dead ends: 1482 [2021-05-22 01:57:00,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-05-22 01:57:00,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1102. [2021-05-22 01:57:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.877384196185286) internal successors, (4269), 1101 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 4269 transitions. [2021-05-22 01:57:00,114 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 4269 transitions. Word has length 25 [2021-05-22 01:57:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:00,114 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 4269 transitions. [2021-05-22 01:57:00,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 4269 transitions. [2021-05-22 01:57:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:00,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:00,115 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:00,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-05-22 01:57:00,115 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:00,115 INFO L82 PathProgramCache]: Analyzing trace with hash 112877023, now seen corresponding path program 577 times [2021-05-22 01:57:00,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:00,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399792311] [2021-05-22 01:57:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399792311] [2021-05-22 01:57:00,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399792311] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810625953] [2021-05-22 01:57:00,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,188 INFO L87 Difference]: Start difference. First operand 1102 states and 4269 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:00,250 INFO L93 Difference]: Finished difference Result 2267 states and 8325 transitions. [2021-05-22 01:57:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:00,254 INFO L225 Difference]: With dead ends: 2267 [2021-05-22 01:57:00,254 INFO L226 Difference]: Without dead ends: 2078 [2021-05-22 01:57:00,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-05-22 01:57:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1152. [2021-05-22 01:57:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.8731537793223283) internal successors, (4458), 1151 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4458 transitions. [2021-05-22 01:57:00,277 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4458 transitions. Word has length 25 [2021-05-22 01:57:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:00,277 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 4458 transitions. [2021-05-22 01:57:00,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4458 transitions. [2021-05-22 01:57:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:00,278 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:00,278 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:00,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-05-22 01:57:00,278 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1930459971, now seen corresponding path program 578 times [2021-05-22 01:57:00,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:00,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755800272] [2021-05-22 01:57:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755800272] [2021-05-22 01:57:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755800272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289229610] [2021-05-22 01:57:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,352 INFO L87 Difference]: Start difference. First operand 1152 states and 4458 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:00,407 INFO L93 Difference]: Finished difference Result 2265 states and 8290 transitions. [2021-05-22 01:57:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:00,411 INFO L225 Difference]: With dead ends: 2265 [2021-05-22 01:57:00,411 INFO L226 Difference]: Without dead ends: 2048 [2021-05-22 01:57:00,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-05-22 01:57:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1122. [2021-05-22 01:57:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8813559322033897) internal successors, (4351), 1121 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4351 transitions. [2021-05-22 01:57:00,433 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4351 transitions. Word has length 25 [2021-05-22 01:57:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:00,433 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 4351 transitions. [2021-05-22 01:57:00,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4351 transitions. [2021-05-22 01:57:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:00,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:00,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:00,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582 [2021-05-22 01:57:00,435 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -733919939, now seen corresponding path program 579 times [2021-05-22 01:57:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:00,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597309804] [2021-05-22 01:57:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597309804] [2021-05-22 01:57:00,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597309804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660365265] [2021-05-22 01:57:00,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,508 INFO L87 Difference]: Start difference. First operand 1122 states and 4351 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:00,564 INFO L93 Difference]: Finished difference Result 2261 states and 8292 transitions. [2021-05-22 01:57:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:00,568 INFO L225 Difference]: With dead ends: 2261 [2021-05-22 01:57:00,568 INFO L226 Difference]: Without dead ends: 2072 [2021-05-22 01:57:00,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-05-22 01:57:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1150. [2021-05-22 01:57:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.8633594429939078) internal successors, (4439), 1149 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4439 transitions. [2021-05-22 01:57:00,592 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4439 transitions. Word has length 25 [2021-05-22 01:57:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:00,592 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 4439 transitions. [2021-05-22 01:57:00,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4439 transitions. [2021-05-22 01:57:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:00,594 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:00,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:00,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583 [2021-05-22 01:57:00,594 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:00,594 INFO L82 PathProgramCache]: Analyzing trace with hash 458546493, now seen corresponding path program 580 times [2021-05-22 01:57:00,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:00,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337942579] [2021-05-22 01:57:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337942579] [2021-05-22 01:57:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337942579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163442850] [2021-05-22 01:57:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,667 INFO L87 Difference]: Start difference. First operand 1150 states and 4439 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:00,723 INFO L93 Difference]: Finished difference Result 2255 states and 8247 transitions. [2021-05-22 01:57:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:00,727 INFO L225 Difference]: With dead ends: 2255 [2021-05-22 01:57:00,727 INFO L226 Difference]: Without dead ends: 2044 [2021-05-22 01:57:00,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:00,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-05-22 01:57:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1122. [2021-05-22 01:57:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8688670829616414) internal successors, (4337), 1121 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4337 transitions. [2021-05-22 01:57:00,750 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4337 transitions. Word has length 25 [2021-05-22 01:57:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:00,750 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 4337 transitions. [2021-05-22 01:57:00,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4337 transitions. [2021-05-22 01:57:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:00,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:00,751 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:00,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584 [2021-05-22 01:57:00,751 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:00,751 INFO L82 PathProgramCache]: Analyzing trace with hash 248427675, now seen corresponding path program 581 times [2021-05-22 01:57:00,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:00,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663547280] [2021-05-22 01:57:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663547280] [2021-05-22 01:57:00,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663547280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382381475] [2021-05-22 01:57:00,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,825 INFO L87 Difference]: Start difference. First operand 1122 states and 4337 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:00,880 INFO L93 Difference]: Finished difference Result 2257 states and 8268 transitions. [2021-05-22 01:57:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:00,884 INFO L225 Difference]: With dead ends: 2257 [2021-05-22 01:57:00,884 INFO L226 Difference]: Without dead ends: 2070 [2021-05-22 01:57:00,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-05-22 01:57:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1150. [2021-05-22 01:57:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.8511749347258486) internal successors, (4425), 1149 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4425 transitions. [2021-05-22 01:57:00,907 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4425 transitions. Word has length 25 [2021-05-22 01:57:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:00,907 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 4425 transitions. [2021-05-22 01:57:00,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4425 transitions. [2021-05-22 01:57:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:00,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:00,909 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:00,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585 [2021-05-22 01:57:00,909 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1329490301, now seen corresponding path program 582 times [2021-05-22 01:57:00,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:00,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388702016] [2021-05-22 01:57:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:00,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:00,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388702016] [2021-05-22 01:57:00,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388702016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:00,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:00,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:00,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332739115] [2021-05-22 01:57:00,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:00,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:00,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:00,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:00,995 INFO L87 Difference]: Start difference. First operand 1150 states and 4425 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:01,051 INFO L93 Difference]: Finished difference Result 2253 states and 8228 transitions. [2021-05-22 01:57:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:01,055 INFO L225 Difference]: With dead ends: 2253 [2021-05-22 01:57:01,055 INFO L226 Difference]: Without dead ends: 2028 [2021-05-22 01:57:01,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-05-22 01:57:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1108. [2021-05-22 01:57:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.878952122854562) internal successors, (4294), 1107 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 4294 transitions. [2021-05-22 01:57:01,077 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 4294 transitions. Word has length 25 [2021-05-22 01:57:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 4294 transitions. [2021-05-22 01:57:01,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 4294 transitions. [2021-05-22 01:57:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:01,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:01,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:01,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586 [2021-05-22 01:57:01,079 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1910184515, now seen corresponding path program 583 times [2021-05-22 01:57:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:01,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546861048] [2021-05-22 01:57:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:01,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:01,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546861048] [2021-05-22 01:57:01,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546861048] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:01,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:01,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:01,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636099672] [2021-05-22 01:57:01,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:01,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:01,155 INFO L87 Difference]: Start difference. First operand 1108 states and 4294 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:01,211 INFO L93 Difference]: Finished difference Result 2223 states and 8131 transitions. [2021-05-22 01:57:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:01,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:01,215 INFO L225 Difference]: With dead ends: 2223 [2021-05-22 01:57:01,215 INFO L226 Difference]: Without dead ends: 2034 [2021-05-22 01:57:01,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-05-22 01:57:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1150. [2021-05-22 01:57:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.866840731070496) internal successors, (4443), 1149 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4443 transitions. [2021-05-22 01:57:01,238 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4443 transitions. Word has length 25 [2021-05-22 01:57:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:01,238 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 4443 transitions. [2021-05-22 01:57:01,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4443 transitions. [2021-05-22 01:57:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:01,239 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:01,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:01,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable587 [2021-05-22 01:57:01,240 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash 341445787, now seen corresponding path program 584 times [2021-05-22 01:57:01,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:01,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441900558] [2021-05-22 01:57:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:01,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:01,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441900558] [2021-05-22 01:57:01,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441900558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:01,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:01,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:01,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954175940] [2021-05-22 01:57:01,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:01,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:01,326 INFO L87 Difference]: Start difference. First operand 1150 states and 4443 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:01,394 INFO L93 Difference]: Finished difference Result 2221 states and 8096 transitions. [2021-05-22 01:57:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:01,398 INFO L225 Difference]: With dead ends: 2221 [2021-05-22 01:57:01,398 INFO L226 Difference]: Without dead ends: 2004 [2021-05-22 01:57:01,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-05-22 01:57:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1120. [2021-05-22 01:57:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.876675603217158) internal successors, (4338), 1119 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4338 transitions. [2021-05-22 01:57:01,431 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4338 transitions. Word has length 25 [2021-05-22 01:57:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:01,431 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 4338 transitions. [2021-05-22 01:57:01,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4338 transitions. [2021-05-22 01:57:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:01,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:01,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:01,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588 [2021-05-22 01:57:01,433 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1588755901, now seen corresponding path program 585 times [2021-05-22 01:57:01,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:01,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076142300] [2021-05-22 01:57:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:01,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:01,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076142300] [2021-05-22 01:57:01,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076142300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:01,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:01,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:01,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375416730] [2021-05-22 01:57:01,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:01,530 INFO L87 Difference]: Start difference. First operand 1120 states and 4338 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:01,599 INFO L93 Difference]: Finished difference Result 2143 states and 7835 transitions. [2021-05-22 01:57:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:01,604 INFO L225 Difference]: With dead ends: 2143 [2021-05-22 01:57:01,604 INFO L226 Difference]: Without dead ends: 1954 [2021-05-22 01:57:01,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-05-22 01:57:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1144. [2021-05-22 01:57:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.8617672790901136) internal successors, (4414), 1143 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4414 transitions. [2021-05-22 01:57:01,636 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4414 transitions. Word has length 25 [2021-05-22 01:57:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:01,636 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4414 transitions. [2021-05-22 01:57:01,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4414 transitions. [2021-05-22 01:57:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:01,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:01,638 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:01,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589 [2021-05-22 01:57:01,639 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2144544189, now seen corresponding path program 586 times [2021-05-22 01:57:01,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:01,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416967462] [2021-05-22 01:57:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:01,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:01,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416967462] [2021-05-22 01:57:01,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416967462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:01,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:01,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:01,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690273045] [2021-05-22 01:57:01,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:01,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:01,721 INFO L87 Difference]: Start difference. First operand 1144 states and 4414 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:01,781 INFO L93 Difference]: Finished difference Result 2001 states and 7381 transitions. [2021-05-22 01:57:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:01,785 INFO L225 Difference]: With dead ends: 2001 [2021-05-22 01:57:01,785 INFO L226 Difference]: Without dead ends: 1802 [2021-05-22 01:57:01,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-05-22 01:57:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1120. [2021-05-22 01:57:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.8659517426273458) internal successors, (4326), 1119 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4326 transitions. [2021-05-22 01:57:01,806 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4326 transitions. Word has length 25 [2021-05-22 01:57:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:01,807 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 4326 transitions. [2021-05-22 01:57:01,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4326 transitions. [2021-05-22 01:57:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:01,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:01,808 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:01,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590 [2021-05-22 01:57:01,808 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:01,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:01,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1723863781, now seen corresponding path program 587 times [2021-05-22 01:57:01,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:01,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115063686] [2021-05-22 01:57:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:01,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:01,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115063686] [2021-05-22 01:57:01,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115063686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:01,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:01,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797280009] [2021-05-22 01:57:01,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:01,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:01,881 INFO L87 Difference]: Start difference. First operand 1120 states and 4326 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:01,938 INFO L93 Difference]: Finished difference Result 2141 states and 7818 transitions. [2021-05-22 01:57:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:01,942 INFO L225 Difference]: With dead ends: 2141 [2021-05-22 01:57:01,942 INFO L226 Difference]: Without dead ends: 1954 [2021-05-22 01:57:01,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-05-22 01:57:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1144. [2021-05-22 01:57:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.851268591426072) internal successors, (4402), 1143 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4402 transitions. [2021-05-22 01:57:01,964 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4402 transitions. Word has length 25 [2021-05-22 01:57:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:01,964 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4402 transitions. [2021-05-22 01:57:01,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4402 transitions. [2021-05-22 01:57:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:01,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:01,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:01,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591 [2021-05-22 01:57:01,966 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1930671747, now seen corresponding path program 588 times [2021-05-22 01:57:01,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:01,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291680687] [2021-05-22 01:57:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:02,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:02,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291680687] [2021-05-22 01:57:02,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291680687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:02,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:02,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:02,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418062915] [2021-05-22 01:57:02,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:02,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:02,039 INFO L87 Difference]: Start difference. First operand 1144 states and 4402 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:02,102 INFO L93 Difference]: Finished difference Result 2001 states and 7369 transitions. [2021-05-22 01:57:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:02,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:02,106 INFO L225 Difference]: With dead ends: 2001 [2021-05-22 01:57:02,106 INFO L226 Difference]: Without dead ends: 1790 [2021-05-22 01:57:02,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-05-22 01:57:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1108. [2021-05-22 01:57:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.8735320686540198) internal successors, (4288), 1107 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 4288 transitions. [2021-05-22 01:57:02,135 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 4288 transitions. Word has length 25 [2021-05-22 01:57:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:02,135 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 4288 transitions. [2021-05-22 01:57:02,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 4288 transitions. [2021-05-22 01:57:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:02,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:02,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:02,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592 [2021-05-22 01:57:02,137 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1528034715, now seen corresponding path program 589 times [2021-05-22 01:57:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:02,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051400823] [2021-05-22 01:57:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:02,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051400823] [2021-05-22 01:57:02,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051400823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:02,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:02,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:02,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297799727] [2021-05-22 01:57:02,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:02,212 INFO L87 Difference]: Start difference. First operand 1108 states and 4288 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:02,272 INFO L93 Difference]: Finished difference Result 2115 states and 7713 transitions. [2021-05-22 01:57:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:02,276 INFO L225 Difference]: With dead ends: 2115 [2021-05-22 01:57:02,276 INFO L226 Difference]: Without dead ends: 1926 [2021-05-22 01:57:02,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-22 01:57:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1148. [2021-05-22 01:57:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.8639930252833476) internal successors, (4432), 1147 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4432 transitions. [2021-05-22 01:57:02,298 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4432 transitions. Word has length 25 [2021-05-22 01:57:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:02,298 INFO L482 AbstractCegarLoop]: Abstraction has 1148 states and 4432 transitions. [2021-05-22 01:57:02,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4432 transitions. [2021-05-22 01:57:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:02,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:02,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:02,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593 [2021-05-22 01:57:02,300 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1574466149, now seen corresponding path program 590 times [2021-05-22 01:57:02,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:02,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867494447] [2021-05-22 01:57:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:02,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:02,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867494447] [2021-05-22 01:57:02,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867494447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:02,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:02,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397153274] [2021-05-22 01:57:02,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:02,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:02,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:02,372 INFO L87 Difference]: Start difference. First operand 1148 states and 4432 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:02,428 INFO L93 Difference]: Finished difference Result 2109 states and 7668 transitions. [2021-05-22 01:57:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:02,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:02,432 INFO L225 Difference]: With dead ends: 2109 [2021-05-22 01:57:02,432 INFO L226 Difference]: Without dead ends: 1898 [2021-05-22 01:57:02,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-05-22 01:57:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1120. [2021-05-22 01:57:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.871313672922252) internal successors, (4332), 1119 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4332 transitions. [2021-05-22 01:57:02,453 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4332 transitions. Word has length 25 [2021-05-22 01:57:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:02,453 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 4332 transitions. [2021-05-22 01:57:02,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4332 transitions. [2021-05-22 01:57:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:02,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:02,455 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:02,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-05-22 01:57:02,455 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1047132669, now seen corresponding path program 591 times [2021-05-22 01:57:02,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:02,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907349315] [2021-05-22 01:57:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:02,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:02,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907349315] [2021-05-22 01:57:02,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907349315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:02,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:02,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:02,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445890946] [2021-05-22 01:57:02,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:02,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:02,537 INFO L87 Difference]: Start difference. First operand 1120 states and 4332 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:02,601 INFO L93 Difference]: Finished difference Result 2017 states and 7336 transitions. [2021-05-22 01:57:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:02,605 INFO L225 Difference]: With dead ends: 2017 [2021-05-22 01:57:02,605 INFO L226 Difference]: Without dead ends: 1828 [2021-05-22 01:57:02,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-05-22 01:57:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1144. [2021-05-22 01:57:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.856517935258093) internal successors, (4408), 1143 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4408 transitions. [2021-05-22 01:57:02,626 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4408 transitions. Word has length 25 [2021-05-22 01:57:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:02,626 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4408 transitions. [2021-05-22 01:57:02,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4408 transitions. [2021-05-22 01:57:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:02,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:02,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:02,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-05-22 01:57:02,628 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash 121482651, now seen corresponding path program 592 times [2021-05-22 01:57:02,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:02,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948985433] [2021-05-22 01:57:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:02,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:02,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948985433] [2021-05-22 01:57:02,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948985433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:02,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:02,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:02,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486377255] [2021-05-22 01:57:02,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:02,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:02,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:02,710 INFO L87 Difference]: Start difference. First operand 1144 states and 4408 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:02,770 INFO L93 Difference]: Finished difference Result 1875 states and 6882 transitions. [2021-05-22 01:57:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:02,774 INFO L225 Difference]: With dead ends: 1875 [2021-05-22 01:57:02,774 INFO L226 Difference]: Without dead ends: 1676 [2021-05-22 01:57:02,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-05-22 01:57:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1120. [2021-05-22 01:57:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.8605898123324396) internal successors, (4320), 1119 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4320 transitions. [2021-05-22 01:57:02,794 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4320 transitions. Word has length 25 [2021-05-22 01:57:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:02,794 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 4320 transitions. [2021-05-22 01:57:02,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4320 transitions. [2021-05-22 01:57:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:02,796 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:02,796 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:02,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-05-22 01:57:02,796 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash -37866085, now seen corresponding path program 593 times [2021-05-22 01:57:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:02,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267651560] [2021-05-22 01:57:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:02,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:02,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267651560] [2021-05-22 01:57:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267651560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:02,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:02,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771415991] [2021-05-22 01:57:02,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:02,872 INFO L87 Difference]: Start difference. First operand 1120 states and 4320 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:02,930 INFO L93 Difference]: Finished difference Result 1883 states and 6922 transitions. [2021-05-22 01:57:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:02,933 INFO L225 Difference]: With dead ends: 1883 [2021-05-22 01:57:02,933 INFO L226 Difference]: Without dead ends: 1700 [2021-05-22 01:57:02,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-05-22 01:57:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1144. [2021-05-22 01:57:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.8460192475940507) internal successors, (4396), 1143 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4396 transitions. [2021-05-22 01:57:02,964 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4396 transitions. Word has length 25 [2021-05-22 01:57:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:02,964 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4396 transitions. [2021-05-22 01:57:02,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4396 transitions. [2021-05-22 01:57:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:02,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:02,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:02,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597 [2021-05-22 01:57:02,966 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:02,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1043196541, now seen corresponding path program 594 times [2021-05-22 01:57:02,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:02,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018428980] [2021-05-22 01:57:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:03,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018428980] [2021-05-22 01:57:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018428980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:03,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:03,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891301977] [2021-05-22 01:57:03,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:03,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:03,040 INFO L87 Difference]: Start difference. First operand 1144 states and 4396 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:03,097 INFO L93 Difference]: Finished difference Result 1699 states and 6309 transitions. [2021-05-22 01:57:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:03,100 INFO L225 Difference]: With dead ends: 1699 [2021-05-22 01:57:03,100 INFO L226 Difference]: Without dead ends: 1488 [2021-05-22 01:57:03,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-05-22 01:57:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1108. [2021-05-22 01:57:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.868112014453478) internal successors, (4282), 1107 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 4282 transitions. [2021-05-22 01:57:03,120 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 4282 transitions. Word has length 25 [2021-05-22 01:57:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:03,120 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 4282 transitions. [2021-05-22 01:57:03,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 4282 transitions. [2021-05-22 01:57:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:03,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:03,121 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:03,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable598 [2021-05-22 01:57:03,121 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1794536071, now seen corresponding path program 595 times [2021-05-22 01:57:03,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:03,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18465306] [2021-05-22 01:57:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:03,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:03,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18465306] [2021-05-22 01:57:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18465306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:03,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:03,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477713408] [2021-05-22 01:57:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:03,199 INFO L87 Difference]: Start difference. First operand 1108 states and 4282 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:03,261 INFO L93 Difference]: Finished difference Result 1803 states and 6620 transitions. [2021-05-22 01:57:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:03,265 INFO L225 Difference]: With dead ends: 1803 [2021-05-22 01:57:03,265 INFO L226 Difference]: Without dead ends: 1616 [2021-05-22 01:57:03,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-05-22 01:57:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1148. [2021-05-22 01:57:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.858761987794246) internal successors, (4426), 1147 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4426 transitions. [2021-05-22 01:57:03,286 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4426 transitions. Word has length 25 [2021-05-22 01:57:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:03,286 INFO L482 AbstractCegarLoop]: Abstraction has 1148 states and 4426 transitions. [2021-05-22 01:57:03,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4426 transitions. [2021-05-22 01:57:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:03,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:03,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:03,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599 [2021-05-22 01:57:03,287 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:03,288 INFO L82 PathProgramCache]: Analyzing trace with hash -713473445, now seen corresponding path program 596 times [2021-05-22 01:57:03,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:03,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633104893] [2021-05-22 01:57:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:03,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633104893] [2021-05-22 01:57:03,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633104893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:03,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:03,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:03,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748316590] [2021-05-22 01:57:03,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:03,366 INFO L87 Difference]: Start difference. First operand 1148 states and 4426 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:03,425 INFO L93 Difference]: Finished difference Result 1799 states and 6580 transitions. [2021-05-22 01:57:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:03,428 INFO L225 Difference]: With dead ends: 1799 [2021-05-22 01:57:03,428 INFO L226 Difference]: Without dead ends: 1588 [2021-05-22 01:57:03,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-05-22 01:57:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1120. [2021-05-22 01:57:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.8659517426273458) internal successors, (4326), 1119 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4326 transitions. [2021-05-22 01:57:03,449 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4326 transitions. Word has length 25 [2021-05-22 01:57:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:03,449 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 4326 transitions. [2021-05-22 01:57:03,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4326 transitions. [2021-05-22 01:57:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:03,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:03,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:03,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600 [2021-05-22 01:57:03,451 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2019529179, now seen corresponding path program 597 times [2021-05-22 01:57:03,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:03,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064638410] [2021-05-22 01:57:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:03,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064638410] [2021-05-22 01:57:03,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064638410] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:03,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:03,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619073915] [2021-05-22 01:57:03,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:03,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:03,534 INFO L87 Difference]: Start difference. First operand 1120 states and 4326 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:03,596 INFO L93 Difference]: Finished difference Result 1715 states and 6276 transitions. [2021-05-22 01:57:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:03,599 INFO L225 Difference]: With dead ends: 1715 [2021-05-22 01:57:03,599 INFO L226 Difference]: Without dead ends: 1528 [2021-05-22 01:57:03,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-05-22 01:57:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1144. [2021-05-22 01:57:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.851268591426072) internal successors, (4402), 1143 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4402 transitions. [2021-05-22 01:57:03,620 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4402 transitions. Word has length 25 [2021-05-22 01:57:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:03,620 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4402 transitions. [2021-05-22 01:57:03,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4402 transitions. [2021-05-22 01:57:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:03,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:03,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:03,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601 [2021-05-22 01:57:03,621 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash 331282907, now seen corresponding path program 598 times [2021-05-22 01:57:03,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:03,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344707819] [2021-05-22 01:57:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:03,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:03,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344707819] [2021-05-22 01:57:03,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344707819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:03,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:03,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:03,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681267153] [2021-05-22 01:57:03,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:03,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:03,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:03,695 INFO L87 Difference]: Start difference. First operand 1144 states and 4402 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:03,751 INFO L93 Difference]: Finished difference Result 1575 states and 5827 transitions. [2021-05-22 01:57:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:03,754 INFO L225 Difference]: With dead ends: 1575 [2021-05-22 01:57:03,754 INFO L226 Difference]: Without dead ends: 1376 [2021-05-22 01:57:03,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-05-22 01:57:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1120. [2021-05-22 01:57:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.8552278820375334) internal successors, (4314), 1119 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4314 transitions. [2021-05-22 01:57:03,773 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4314 transitions. Word has length 25 [2021-05-22 01:57:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:03,773 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 4314 transitions. [2021-05-22 01:57:03,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4314 transitions. [2021-05-22 01:57:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:03,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:03,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:03,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-05-22 01:57:03,775 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1887433155, now seen corresponding path program 599 times [2021-05-22 01:57:03,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:03,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404358335] [2021-05-22 01:57:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:03,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:03,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404358335] [2021-05-22 01:57:03,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404358335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:03,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:03,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:03,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075732345] [2021-05-22 01:57:03,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:03,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:03,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:03,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:03,850 INFO L87 Difference]: Start difference. First operand 1120 states and 4314 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:03,902 INFO L93 Difference]: Finished difference Result 1503 states and 5563 transitions. [2021-05-22 01:57:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:03,905 INFO L225 Difference]: With dead ends: 1503 [2021-05-22 01:57:03,905 INFO L226 Difference]: Without dead ends: 1320 [2021-05-22 01:57:03,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-05-22 01:57:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1144. [2021-05-22 01:57:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.8407699037620295) internal successors, (4390), 1143 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4390 transitions. [2021-05-22 01:57:03,925 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4390 transitions. Word has length 25 [2021-05-22 01:57:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:03,925 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4390 transitions. [2021-05-22 01:57:03,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4390 transitions. [2021-05-22 01:57:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:03,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:03,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:03,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-05-22 01:57:03,927 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1560737179, now seen corresponding path program 600 times [2021-05-22 01:57:03,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:03,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871343486] [2021-05-22 01:57:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871343486] [2021-05-22 01:57:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871343486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023290757] [2021-05-22 01:57:04,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,004 INFO L87 Difference]: Start difference. First operand 1144 states and 4390 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:04,062 INFO L93 Difference]: Finished difference Result 1319 states and 4950 transitions. [2021-05-22 01:57:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:04,065 INFO L225 Difference]: With dead ends: 1319 [2021-05-22 01:57:04,065 INFO L226 Difference]: Without dead ends: 1100 [2021-05-22 01:57:04,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-05-22 01:57:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2021-05-22 01:57:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.880800727934486) internal successors, (4265), 1099 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 4265 transitions. [2021-05-22 01:57:04,082 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 4265 transitions. Word has length 25 [2021-05-22 01:57:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:04,082 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 4265 transitions. [2021-05-22 01:57:04,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 4265 transitions. [2021-05-22 01:57:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:04,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:04,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:04,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604 [2021-05-22 01:57:04,084 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1731112383, now seen corresponding path program 601 times [2021-05-22 01:57:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:04,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968446992] [2021-05-22 01:57:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968446992] [2021-05-22 01:57:04,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968446992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953564611] [2021-05-22 01:57:04,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,159 INFO L87 Difference]: Start difference. First operand 1100 states and 4265 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:04,218 INFO L93 Difference]: Finished difference Result 2103 states and 7646 transitions. [2021-05-22 01:57:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:04,221 INFO L225 Difference]: With dead ends: 2103 [2021-05-22 01:57:04,221 INFO L226 Difference]: Without dead ends: 1914 [2021-05-22 01:57:04,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-05-22 01:57:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1144. [2021-05-22 01:57:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.869641294838145) internal successors, (4423), 1143 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4423 transitions. [2021-05-22 01:57:04,244 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4423 transitions. Word has length 25 [2021-05-22 01:57:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:04,244 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 4423 transitions. [2021-05-22 01:57:04,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4423 transitions. [2021-05-22 01:57:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:04,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:04,246 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:04,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605 [2021-05-22 01:57:04,246 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 520517919, now seen corresponding path program 602 times [2021-05-22 01:57:04,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:04,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825405922] [2021-05-22 01:57:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825405922] [2021-05-22 01:57:04,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825405922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989579496] [2021-05-22 01:57:04,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,321 INFO L87 Difference]: Start difference. First operand 1144 states and 4423 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:04,389 INFO L93 Difference]: Finished difference Result 2101 states and 7611 transitions. [2021-05-22 01:57:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:04,393 INFO L225 Difference]: With dead ends: 2101 [2021-05-22 01:57:04,393 INFO L226 Difference]: Without dead ends: 1884 [2021-05-22 01:57:04,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-05-22 01:57:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1114. [2021-05-22 01:57:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8778077268643307) internal successors, (4316), 1113 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4316 transitions. [2021-05-22 01:57:04,415 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4316 transitions. Word has length 25 [2021-05-22 01:57:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:04,415 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4316 transitions. [2021-05-22 01:57:04,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4316 transitions. [2021-05-22 01:57:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:04,416 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:04,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:04,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606 [2021-05-22 01:57:04,416 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1717057951, now seen corresponding path program 603 times [2021-05-22 01:57:04,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:04,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177125495] [2021-05-22 01:57:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177125495] [2021-05-22 01:57:04,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177125495] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058304614] [2021-05-22 01:57:04,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,490 INFO L87 Difference]: Start difference. First operand 1114 states and 4316 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:04,549 INFO L93 Difference]: Finished difference Result 2097 states and 7613 transitions. [2021-05-22 01:57:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:04,553 INFO L225 Difference]: With dead ends: 2097 [2021-05-22 01:57:04,553 INFO L226 Difference]: Without dead ends: 1908 [2021-05-22 01:57:04,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-05-22 01:57:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1142. [2021-05-22 01:57:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.85977212971078) internal successors, (4404), 1141 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4404 transitions. [2021-05-22 01:57:04,575 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4404 transitions. Word has length 25 [2021-05-22 01:57:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:04,575 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 4404 transitions. [2021-05-22 01:57:04,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4404 transitions. [2021-05-22 01:57:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:04,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:04,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:04,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607 [2021-05-22 01:57:04,576 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1385442913, now seen corresponding path program 604 times [2021-05-22 01:57:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827609702] [2021-05-22 01:57:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827609702] [2021-05-22 01:57:04,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827609702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054904575] [2021-05-22 01:57:04,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,650 INFO L87 Difference]: Start difference. First operand 1142 states and 4404 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:04,705 INFO L93 Difference]: Finished difference Result 2091 states and 7568 transitions. [2021-05-22 01:57:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:04,709 INFO L225 Difference]: With dead ends: 2091 [2021-05-22 01:57:04,709 INFO L226 Difference]: Without dead ends: 1880 [2021-05-22 01:57:04,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-05-22 01:57:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1114. [2021-05-22 01:57:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8652291105121295) internal successors, (4302), 1113 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4302 transitions. [2021-05-22 01:57:04,731 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4302 transitions. Word has length 25 [2021-05-22 01:57:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:04,731 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4302 transitions. [2021-05-22 01:57:04,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4302 transitions. [2021-05-22 01:57:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:04,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:04,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:04,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608 [2021-05-22 01:57:04,732 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1595561731, now seen corresponding path program 605 times [2021-05-22 01:57:04,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:04,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784955329] [2021-05-22 01:57:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784955329] [2021-05-22 01:57:04,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784955329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316240652] [2021-05-22 01:57:04,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,807 INFO L87 Difference]: Start difference. First operand 1114 states and 4302 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:04,863 INFO L93 Difference]: Finished difference Result 2093 states and 7589 transitions. [2021-05-22 01:57:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:04,867 INFO L225 Difference]: With dead ends: 2093 [2021-05-22 01:57:04,867 INFO L226 Difference]: Without dead ends: 1906 [2021-05-22 01:57:04,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-05-22 01:57:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1142. [2021-05-22 01:57:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.847502191060473) internal successors, (4390), 1141 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4390 transitions. [2021-05-22 01:57:04,889 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4390 transitions. Word has length 25 [2021-05-22 01:57:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:04,889 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 4390 transitions. [2021-05-22 01:57:04,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4390 transitions. [2021-05-22 01:57:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:04,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:04,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:04,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609 [2021-05-22 01:57:04,891 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -514499105, now seen corresponding path program 606 times [2021-05-22 01:57:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:04,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644715617] [2021-05-22 01:57:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:04,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644715617] [2021-05-22 01:57:04,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644715617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:04,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:04,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:04,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118433375] [2021-05-22 01:57:04,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:04,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:04,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:04,965 INFO L87 Difference]: Start difference. First operand 1142 states and 4390 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,019 INFO L93 Difference]: Finished difference Result 2089 states and 7549 transitions. [2021-05-22 01:57:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,023 INFO L225 Difference]: With dead ends: 2089 [2021-05-22 01:57:05,023 INFO L226 Difference]: Without dead ends: 1864 [2021-05-22 01:57:05,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-05-22 01:57:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1100. [2021-05-22 01:57:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.875341219290264) internal successors, (4259), 1099 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 4259 transitions. [2021-05-22 01:57:05,044 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 4259 transitions. Word has length 25 [2021-05-22 01:57:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:05,044 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 4259 transitions. [2021-05-22 01:57:05,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 4259 transitions. [2021-05-22 01:57:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:05,046 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:05,046 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:05,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610 [2021-05-22 01:57:05,046 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash 540793375, now seen corresponding path program 607 times [2021-05-22 01:57:05,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:05,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368323169] [2021-05-22 01:57:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:05,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:05,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368323169] [2021-05-22 01:57:05,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368323169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:05,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:05,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:05,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381210115] [2021-05-22 01:57:05,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:05,123 INFO L87 Difference]: Start difference. First operand 1100 states and 4259 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,178 INFO L93 Difference]: Finished difference Result 2085 states and 7571 transitions. [2021-05-22 01:57:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,181 INFO L225 Difference]: With dead ends: 2085 [2021-05-22 01:57:05,181 INFO L226 Difference]: Without dead ends: 1896 [2021-05-22 01:57:05,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-05-22 01:57:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1142. [2021-05-22 01:57:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.8632778264680105) internal successors, (4408), 1141 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4408 transitions. [2021-05-22 01:57:05,203 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4408 transitions. Word has length 25 [2021-05-22 01:57:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:05,204 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 4408 transitions. [2021-05-22 01:57:05,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4408 transitions. [2021-05-22 01:57:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:05,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:05,205 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:05,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611 [2021-05-22 01:57:05,205 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1502543619, now seen corresponding path program 608 times [2021-05-22 01:57:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:05,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595139097] [2021-05-22 01:57:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:05,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:05,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595139097] [2021-05-22 01:57:05,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595139097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:05,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:05,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:05,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530691986] [2021-05-22 01:57:05,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:05,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:05,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:05,279 INFO L87 Difference]: Start difference. First operand 1142 states and 4408 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,336 INFO L93 Difference]: Finished difference Result 2083 states and 7536 transitions. [2021-05-22 01:57:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,339 INFO L225 Difference]: With dead ends: 2083 [2021-05-22 01:57:05,339 INFO L226 Difference]: Without dead ends: 1866 [2021-05-22 01:57:05,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-05-22 01:57:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1112. [2021-05-22 01:57:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.8730873087308733) internal successors, (4303), 1111 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4303 transitions. [2021-05-22 01:57:05,361 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4303 transitions. Word has length 25 [2021-05-22 01:57:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:05,361 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4303 transitions. [2021-05-22 01:57:05,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4303 transitions. [2021-05-22 01:57:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:05,363 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:05,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:05,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612 [2021-05-22 01:57:05,363 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:05,363 INFO L82 PathProgramCache]: Analyzing trace with hash -255233505, now seen corresponding path program 609 times [2021-05-22 01:57:05,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:05,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697299155] [2021-05-22 01:57:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:05,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697299155] [2021-05-22 01:57:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697299155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:05,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:05,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74292687] [2021-05-22 01:57:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:05,447 INFO L87 Difference]: Start difference. First operand 1112 states and 4303 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,501 INFO L93 Difference]: Finished difference Result 2067 states and 7496 transitions. [2021-05-22 01:57:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,505 INFO L225 Difference]: With dead ends: 2067 [2021-05-22 01:57:05,505 INFO L226 Difference]: Without dead ends: 1878 [2021-05-22 01:57:05,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-05-22 01:57:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1136. [2021-05-22 01:57:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.8581497797356827) internal successors, (4379), 1135 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4379 transitions. [2021-05-22 01:57:05,528 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4379 transitions. Word has length 25 [2021-05-22 01:57:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:05,528 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 4379 transitions. [2021-05-22 01:57:05,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4379 transitions. [2021-05-22 01:57:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:05,529 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:05,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:05,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613 [2021-05-22 01:57:05,530 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 300554783, now seen corresponding path program 610 times [2021-05-22 01:57:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:05,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435427820] [2021-05-22 01:57:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:05,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435427820] [2021-05-22 01:57:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435427820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:05,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:05,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:05,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079299881] [2021-05-22 01:57:05,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:05,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:05,614 INFO L87 Difference]: Start difference. First operand 1136 states and 4379 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,669 INFO L93 Difference]: Finished difference Result 2053 states and 7427 transitions. [2021-05-22 01:57:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,673 INFO L225 Difference]: With dead ends: 2053 [2021-05-22 01:57:05,673 INFO L226 Difference]: Without dead ends: 1854 [2021-05-22 01:57:05,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-05-22 01:57:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1112. [2021-05-22 01:57:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.862286228622862) internal successors, (4291), 1111 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4291 transitions. [2021-05-22 01:57:05,696 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4291 transitions. Word has length 25 [2021-05-22 01:57:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:05,696 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4291 transitions. [2021-05-22 01:57:05,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4291 transitions. [2021-05-22 01:57:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:05,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:05,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:05,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614 [2021-05-22 01:57:05,697 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash 727114109, now seen corresponding path program 611 times [2021-05-22 01:57:05,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:05,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80986520] [2021-05-22 01:57:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:05,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80986520] [2021-05-22 01:57:05,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80986520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:05,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:05,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:05,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635124256] [2021-05-22 01:57:05,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:05,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:05,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:05,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:05,771 INFO L87 Difference]: Start difference. First operand 1112 states and 4291 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,824 INFO L93 Difference]: Finished difference Result 2063 states and 7474 transitions. [2021-05-22 01:57:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,828 INFO L225 Difference]: With dead ends: 2063 [2021-05-22 01:57:05,828 INFO L226 Difference]: Without dead ends: 1876 [2021-05-22 01:57:05,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-05-22 01:57:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1136. [2021-05-22 01:57:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.8475770925110133) internal successors, (4367), 1135 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4367 transitions. [2021-05-22 01:57:05,851 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4367 transitions. Word has length 25 [2021-05-22 01:57:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:05,851 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 4367 transitions. [2021-05-22 01:57:05,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4367 transitions. [2021-05-22 01:57:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:05,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:05,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:05,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615 [2021-05-22 01:57:05,853 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 520306143, now seen corresponding path program 612 times [2021-05-22 01:57:05,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:05,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999076623] [2021-05-22 01:57:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:05,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:05,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999076623] [2021-05-22 01:57:05,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999076623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:05,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:05,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:05,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177165402] [2021-05-22 01:57:05,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:05,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:05,927 INFO L87 Difference]: Start difference. First operand 1136 states and 4367 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:05,982 INFO L93 Difference]: Finished difference Result 2051 states and 7410 transitions. [2021-05-22 01:57:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:05,985 INFO L225 Difference]: With dead ends: 2051 [2021-05-22 01:57:05,986 INFO L226 Difference]: Without dead ends: 1840 [2021-05-22 01:57:05,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-05-22 01:57:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1100. [2021-05-22 01:57:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.869881710646042) internal successors, (4253), 1099 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 4253 transitions. [2021-05-22 01:57:06,008 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 4253 transitions. Word has length 25 [2021-05-22 01:57:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:06,008 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 4253 transitions. [2021-05-22 01:57:06,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 4253 transitions. [2021-05-22 01:57:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:06,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:06,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:06,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-05-22 01:57:06,009 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash -315954691, now seen corresponding path program 613 times [2021-05-22 01:57:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:06,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476855379] [2021-05-22 01:57:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:06,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:06,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476855379] [2021-05-22 01:57:06,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476855379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:06,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:06,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:06,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979167894] [2021-05-22 01:57:06,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:06,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:06,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:06,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:06,084 INFO L87 Difference]: Start difference. First operand 1100 states and 4253 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:06,140 INFO L93 Difference]: Finished difference Result 2073 states and 7527 transitions. [2021-05-22 01:57:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:06,144 INFO L225 Difference]: With dead ends: 2073 [2021-05-22 01:57:06,144 INFO L226 Difference]: Without dead ends: 1884 [2021-05-22 01:57:06,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-05-22 01:57:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1140. [2021-05-22 01:57:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.8604038630377526) internal successors, (4397), 1139 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 4397 transitions. [2021-05-22 01:57:06,167 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 4397 transitions. Word has length 25 [2021-05-22 01:57:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:06,167 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 4397 transitions. [2021-05-22 01:57:06,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 4397 transitions. [2021-05-22 01:57:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:06,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:06,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:06,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-05-22 01:57:06,169 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash 876511741, now seen corresponding path program 614 times [2021-05-22 01:57:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:06,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929412488] [2021-05-22 01:57:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:06,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:06,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929412488] [2021-05-22 01:57:06,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929412488] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:06,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:06,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:06,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355904263] [2021-05-22 01:57:06,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:06,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:06,248 INFO L87 Difference]: Start difference. First operand 1140 states and 4397 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:06,301 INFO L93 Difference]: Finished difference Result 2067 states and 7482 transitions. [2021-05-22 01:57:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:06,304 INFO L225 Difference]: With dead ends: 2067 [2021-05-22 01:57:06,305 INFO L226 Difference]: Without dead ends: 1856 [2021-05-22 01:57:06,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-05-22 01:57:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1112. [2021-05-22 01:57:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.867686768676868) internal successors, (4297), 1111 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4297 transitions. [2021-05-22 01:57:06,327 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4297 transitions. Word has length 25 [2021-05-22 01:57:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:06,327 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4297 transitions. [2021-05-22 01:57:06,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4297 transitions. [2021-05-22 01:57:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:06,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:06,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:06,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-05-22 01:57:06,329 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -796856737, now seen corresponding path program 615 times [2021-05-22 01:57:06,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:06,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474840920] [2021-05-22 01:57:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:06,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:06,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474840920] [2021-05-22 01:57:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474840920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:06,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:06,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:06,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030284366] [2021-05-22 01:57:06,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:06,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:06,413 INFO L87 Difference]: Start difference. First operand 1112 states and 4297 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:06,471 INFO L93 Difference]: Finished difference Result 2061 states and 7471 transitions. [2021-05-22 01:57:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:06,474 INFO L225 Difference]: With dead ends: 2061 [2021-05-22 01:57:06,474 INFO L226 Difference]: Without dead ends: 1872 [2021-05-22 01:57:06,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-05-22 01:57:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1136. [2021-05-22 01:57:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.852863436123348) internal successors, (4373), 1135 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4373 transitions. [2021-05-22 01:57:06,496 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4373 transitions. Word has length 25 [2021-05-22 01:57:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:06,496 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 4373 transitions. [2021-05-22 01:57:06,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4373 transitions. [2021-05-22 01:57:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:06,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:06,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:06,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-05-22 01:57:06,498 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:06,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1722506755, now seen corresponding path program 616 times [2021-05-22 01:57:06,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:06,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856640039] [2021-05-22 01:57:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:06,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856640039] [2021-05-22 01:57:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856640039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:06,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:06,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293622113] [2021-05-22 01:57:06,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:06,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:06,591 INFO L87 Difference]: Start difference. First operand 1136 states and 4373 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:06,646 INFO L93 Difference]: Finished difference Result 2047 states and 7402 transitions. [2021-05-22 01:57:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:06,650 INFO L225 Difference]: With dead ends: 2047 [2021-05-22 01:57:06,650 INFO L226 Difference]: Without dead ends: 1848 [2021-05-22 01:57:06,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2021-05-22 01:57:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1112. [2021-05-22 01:57:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.8568856885688567) internal successors, (4285), 1111 states have internal predecessors, (4285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4285 transitions. [2021-05-22 01:57:06,672 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4285 transitions. Word has length 25 [2021-05-22 01:57:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:06,672 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4285 transitions. [2021-05-22 01:57:06,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4285 transitions. [2021-05-22 01:57:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:06,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:06,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:06,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-05-22 01:57:06,674 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1881855491, now seen corresponding path program 617 times [2021-05-22 01:57:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213796780] [2021-05-22 01:57:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:06,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:06,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213796780] [2021-05-22 01:57:06,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213796780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:06,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:06,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:06,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095786071] [2021-05-22 01:57:06,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:06,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:06,759 INFO L87 Difference]: Start difference. First operand 1112 states and 4285 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:06,817 INFO L93 Difference]: Finished difference Result 2049 states and 7425 transitions. [2021-05-22 01:57:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:06,820 INFO L225 Difference]: With dead ends: 2049 [2021-05-22 01:57:06,820 INFO L226 Difference]: Without dead ends: 1866 [2021-05-22 01:57:06,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-05-22 01:57:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1136. [2021-05-22 01:57:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.8422907488986784) internal successors, (4361), 1135 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4361 transitions. [2021-05-22 01:57:06,843 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4361 transitions. Word has length 25 [2021-05-22 01:57:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:06,843 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 4361 transitions. [2021-05-22 01:57:06,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4361 transitions. [2021-05-22 01:57:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:06,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:06,844 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:06,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-05-22 01:57:06,845 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -800792865, now seen corresponding path program 618 times [2021-05-22 01:57:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997243881] [2021-05-22 01:57:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:06,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997243881] [2021-05-22 01:57:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997243881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:06,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:06,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308691877] [2021-05-22 01:57:06,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:06,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:06,919 INFO L87 Difference]: Start difference. First operand 1136 states and 4361 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:06,976 INFO L93 Difference]: Finished difference Result 2041 states and 7373 transitions. [2021-05-22 01:57:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:06,980 INFO L225 Difference]: With dead ends: 2041 [2021-05-22 01:57:06,980 INFO L226 Difference]: Without dead ends: 1830 [2021-05-22 01:57:06,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-05-22 01:57:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1100. [2021-05-22 01:57:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.86442220200182) internal successors, (4247), 1099 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 4247 transitions. [2021-05-22 01:57:07,002 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 4247 transitions. Word has length 25 [2021-05-22 01:57:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,002 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 4247 transitions. [2021-05-22 01:57:07,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 4247 transitions. [2021-05-22 01:57:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-05-22 01:57:07,004 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash 656441819, now seen corresponding path program 619 times [2021-05-22 01:57:07,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144795681] [2021-05-22 01:57:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:07,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:07,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144795681] [2021-05-22 01:57:07,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144795681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:07,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:07,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:07,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41055538] [2021-05-22 01:57:07,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:07,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:07,078 INFO L87 Difference]: Start difference. First operand 1100 states and 4247 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:07,133 INFO L93 Difference]: Finished difference Result 2067 states and 7506 transitions. [2021-05-22 01:57:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:07,137 INFO L225 Difference]: With dead ends: 2067 [2021-05-22 01:57:07,137 INFO L226 Difference]: Without dead ends: 1880 [2021-05-22 01:57:07,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-05-22 01:57:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1140. [2021-05-22 01:57:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.85513608428446) internal successors, (4391), 1139 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 4391 transitions. [2021-05-22 01:57:07,159 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 4391 transitions. Word has length 25 [2021-05-22 01:57:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,159 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 4391 transitions. [2021-05-22 01:57:07,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 4391 transitions. [2021-05-22 01:57:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-05-22 01:57:07,160 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1737504445, now seen corresponding path program 620 times [2021-05-22 01:57:07,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183627310] [2021-05-22 01:57:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:07,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183627310] [2021-05-22 01:57:07,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183627310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:07,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:07,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:07,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378454008] [2021-05-22 01:57:07,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:07,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:07,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:07,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:07,236 INFO L87 Difference]: Start difference. First operand 1140 states and 4391 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:07,289 INFO L93 Difference]: Finished difference Result 2063 states and 7466 transitions. [2021-05-22 01:57:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:07,292 INFO L225 Difference]: With dead ends: 2063 [2021-05-22 01:57:07,292 INFO L226 Difference]: Without dead ends: 1852 [2021-05-22 01:57:07,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-05-22 01:57:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1112. [2021-05-22 01:57:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.862286228622862) internal successors, (4291), 1111 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4291 transitions. [2021-05-22 01:57:07,314 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4291 transitions. Word has length 25 [2021-05-22 01:57:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,314 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4291 transitions. [2021-05-22 01:57:07,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4291 transitions. [2021-05-22 01:57:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,316 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-05-22 01:57:07,316 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash 175539773, now seen corresponding path program 621 times [2021-05-22 01:57:07,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772688357] [2021-05-22 01:57:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:07,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:07,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772688357] [2021-05-22 01:57:07,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772688357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:07,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:07,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:07,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108042727] [2021-05-22 01:57:07,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:07,390 INFO L87 Difference]: Start difference. First operand 1112 states and 4291 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:07,450 INFO L93 Difference]: Finished difference Result 2055 states and 7450 transitions. [2021-05-22 01:57:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:07,454 INFO L225 Difference]: With dead ends: 2055 [2021-05-22 01:57:07,454 INFO L226 Difference]: Without dead ends: 1868 [2021-05-22 01:57:07,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-05-22 01:57:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1136. [2021-05-22 01:57:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.8475770925110133) internal successors, (4367), 1135 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4367 transitions. [2021-05-22 01:57:07,476 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4367 transitions. Word has length 25 [2021-05-22 01:57:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,476 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 4367 transitions. [2021-05-22 01:57:07,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4367 transitions. [2021-05-22 01:57:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,478 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-05-22 01:57:07,478 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1512706499, now seen corresponding path program 622 times [2021-05-22 01:57:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902197582] [2021-05-22 01:57:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:07,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902197582] [2021-05-22 01:57:07,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902197582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:07,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:07,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:07,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145225203] [2021-05-22 01:57:07,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:07,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:07,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:07,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:07,553 INFO L87 Difference]: Start difference. First operand 1136 states and 4367 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:07,613 INFO L93 Difference]: Finished difference Result 2043 states and 7386 transitions. [2021-05-22 01:57:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:07,616 INFO L225 Difference]: With dead ends: 2043 [2021-05-22 01:57:07,616 INFO L226 Difference]: Without dead ends: 1844 [2021-05-22 01:57:07,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-05-22 01:57:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1112. [2021-05-22 01:57:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.8514851485148514) internal successors, (4279), 1111 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4279 transitions. [2021-05-22 01:57:07,638 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4279 transitions. Word has length 25 [2021-05-22 01:57:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,638 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4279 transitions. [2021-05-22 01:57:07,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4279 transitions. [2021-05-22 01:57:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,640 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626 [2021-05-22 01:57:07,640 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,640 INFO L82 PathProgramCache]: Analyzing trace with hash 563544735, now seen corresponding path program 623 times [2021-05-22 01:57:07,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115917026] [2021-05-22 01:57:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:07,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115917026] [2021-05-22 01:57:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115917026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:07,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:07,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:07,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390124143] [2021-05-22 01:57:07,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:07,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:07,716 INFO L87 Difference]: Start difference. First operand 1112 states and 4279 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:07,771 INFO L93 Difference]: Finished difference Result 2047 states and 7414 transitions. [2021-05-22 01:57:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:07,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:07,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:07,774 INFO L225 Difference]: With dead ends: 2047 [2021-05-22 01:57:07,775 INFO L226 Difference]: Without dead ends: 1864 [2021-05-22 01:57:07,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-05-22 01:57:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1136. [2021-05-22 01:57:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.8370044052863435) internal successors, (4355), 1135 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4355 transitions. [2021-05-22 01:57:07,797 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4355 transitions. Word has length 25 [2021-05-22 01:57:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,797 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 4355 transitions. [2021-05-22 01:57:07,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4355 transitions. [2021-05-22 01:57:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,798 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,798 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627 [2021-05-22 01:57:07,798 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,798 INFO L82 PathProgramCache]: Analyzing trace with hash -283252227, now seen corresponding path program 624 times [2021-05-22 01:57:07,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760458134] [2021-05-22 01:57:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:07,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:07,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760458134] [2021-05-22 01:57:07,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760458134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:07,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:07,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392224437] [2021-05-22 01:57:07,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:07,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:07,873 INFO L87 Difference]: Start difference. First operand 1136 states and 4355 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:07,930 INFO L93 Difference]: Finished difference Result 2039 states and 7362 transitions. [2021-05-22 01:57:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:07,933 INFO L225 Difference]: With dead ends: 2039 [2021-05-22 01:57:07,933 INFO L226 Difference]: Without dead ends: 1822 [2021-05-22 01:57:07,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-05-22 01:57:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1094. [2021-05-22 01:57:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.8709972552607503) internal successors, (4231), 1093 states have internal predecessors, (4231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4231 transitions. [2021-05-22 01:57:07,955 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4231 transitions. Word has length 25 [2021-05-22 01:57:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:07,955 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 4231 transitions. [2021-05-22 01:57:07,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4231 transitions. [2021-05-22 01:57:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:07,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:07,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:07,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628 [2021-05-22 01:57:07,957 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1270425503, now seen corresponding path program 625 times [2021-05-22 01:57:07,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:07,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011522075] [2021-05-22 01:57:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011522075] [2021-05-22 01:57:08,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011522075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829579443] [2021-05-22 01:57:08,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,032 INFO L87 Difference]: Start difference. First operand 1094 states and 4231 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:08,090 INFO L93 Difference]: Finished difference Result 2083 states and 7547 transitions. [2021-05-22 01:57:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:08,094 INFO L225 Difference]: With dead ends: 2083 [2021-05-22 01:57:08,094 INFO L226 Difference]: Without dead ends: 1894 [2021-05-22 01:57:08,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-05-22 01:57:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1124. [2021-05-22 01:57:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.85040071237756) internal successors, (4324), 1123 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 4324 transitions. [2021-05-22 01:57:08,116 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 4324 transitions. Word has length 25 [2021-05-22 01:57:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:08,116 INFO L482 AbstractCegarLoop]: Abstraction has 1124 states and 4324 transitions. [2021-05-22 01:57:08,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 4324 transitions. [2021-05-22 01:57:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:08,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:08,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:08,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629 [2021-05-22 01:57:08,118 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -772911491, now seen corresponding path program 626 times [2021-05-22 01:57:08,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:08,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913437777] [2021-05-22 01:57:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913437777] [2021-05-22 01:57:08,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913437777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085357987] [2021-05-22 01:57:08,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,193 INFO L87 Difference]: Start difference. First operand 1124 states and 4324 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:08,253 INFO L93 Difference]: Finished difference Result 2081 states and 7512 transitions. [2021-05-22 01:57:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:08,256 INFO L225 Difference]: With dead ends: 2081 [2021-05-22 01:57:08,256 INFO L226 Difference]: Without dead ends: 1864 [2021-05-22 01:57:08,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-05-22 01:57:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1094. [2021-05-22 01:57:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.858188472095151) internal successors, (4217), 1093 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4217 transitions. [2021-05-22 01:57:08,278 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4217 transitions. Word has length 25 [2021-05-22 01:57:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:08,278 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 4217 transitions. [2021-05-22 01:57:08,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4217 transitions. [2021-05-22 01:57:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:08,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:08,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:08,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630 [2021-05-22 01:57:08,280 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:08,280 INFO L82 PathProgramCache]: Analyzing trace with hash 423628541, now seen corresponding path program 627 times [2021-05-22 01:57:08,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:08,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976946006] [2021-05-22 01:57:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976946006] [2021-05-22 01:57:08,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976946006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972624404] [2021-05-22 01:57:08,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,355 INFO L87 Difference]: Start difference. First operand 1094 states and 4217 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:08,409 INFO L93 Difference]: Finished difference Result 2077 states and 7514 transitions. [2021-05-22 01:57:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:08,412 INFO L225 Difference]: With dead ends: 2077 [2021-05-22 01:57:08,412 INFO L226 Difference]: Without dead ends: 1888 [2021-05-22 01:57:08,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-05-22 01:57:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1122. [2021-05-22 01:57:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.840321141837645) internal successors, (4305), 1121 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4305 transitions. [2021-05-22 01:57:08,434 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4305 transitions. Word has length 25 [2021-05-22 01:57:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:08,434 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 4305 transitions. [2021-05-22 01:57:08,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4305 transitions. [2021-05-22 01:57:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:08,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:08,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:08,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable631 [2021-05-22 01:57:08,436 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1616094973, now seen corresponding path program 628 times [2021-05-22 01:57:08,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:08,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990292056] [2021-05-22 01:57:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990292056] [2021-05-22 01:57:08,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990292056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261195286] [2021-05-22 01:57:08,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,511 INFO L87 Difference]: Start difference. First operand 1122 states and 4305 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:08,567 INFO L93 Difference]: Finished difference Result 2071 states and 7469 transitions. [2021-05-22 01:57:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:08,570 INFO L225 Difference]: With dead ends: 2071 [2021-05-22 01:57:08,570 INFO L226 Difference]: Without dead ends: 1860 [2021-05-22 01:57:08,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-05-22 01:57:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1094. [2021-05-22 01:57:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.8453796889295515) internal successors, (4203), 1093 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4203 transitions. [2021-05-22 01:57:08,592 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4203 transitions. Word has length 25 [2021-05-22 01:57:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:08,592 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 4203 transitions. [2021-05-22 01:57:08,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4203 transitions. [2021-05-22 01:57:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:08,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:08,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:08,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632 [2021-05-22 01:57:08,593 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:08,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1405976155, now seen corresponding path program 629 times [2021-05-22 01:57:08,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:08,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719596958] [2021-05-22 01:57:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719596958] [2021-05-22 01:57:08,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719596958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343756582] [2021-05-22 01:57:08,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,669 INFO L87 Difference]: Start difference. First operand 1094 states and 4203 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:08,725 INFO L93 Difference]: Finished difference Result 2073 states and 7490 transitions. [2021-05-22 01:57:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:08,738 INFO L225 Difference]: With dead ends: 2073 [2021-05-22 01:57:08,738 INFO L226 Difference]: Without dead ends: 1886 [2021-05-22 01:57:08,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-05-22 01:57:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1122. [2021-05-22 01:57:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8278322925958963) internal successors, (4291), 1121 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4291 transitions. [2021-05-22 01:57:08,760 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4291 transitions. Word has length 25 [2021-05-22 01:57:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:08,760 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 4291 transitions. [2021-05-22 01:57:08,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4291 transitions. [2021-05-22 01:57:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:08,761 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:08,761 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:08,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633 [2021-05-22 01:57:08,761 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1807928515, now seen corresponding path program 630 times [2021-05-22 01:57:08,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:08,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145211513] [2021-05-22 01:57:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145211513] [2021-05-22 01:57:08,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145211513] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133071303] [2021-05-22 01:57:08,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,836 INFO L87 Difference]: Start difference. First operand 1122 states and 4291 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:08,891 INFO L93 Difference]: Finished difference Result 2069 states and 7450 transitions. [2021-05-22 01:57:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:08,894 INFO L225 Difference]: With dead ends: 2069 [2021-05-22 01:57:08,895 INFO L226 Difference]: Without dead ends: 1844 [2021-05-22 01:57:08,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-05-22 01:57:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1080. [2021-05-22 01:57:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.854494902687674) internal successors, (4159), 1079 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 4159 transitions. [2021-05-22 01:57:08,916 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 4159 transitions. Word has length 25 [2021-05-22 01:57:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:08,916 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 4159 transitions. [2021-05-22 01:57:08,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 4159 transitions. [2021-05-22 01:57:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:08,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:08,917 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:08,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634 [2021-05-22 01:57:08,918 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:08,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1591582817, now seen corresponding path program 631 times [2021-05-22 01:57:08,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:08,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163592055] [2021-05-22 01:57:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:08,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163592055] [2021-05-22 01:57:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163592055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:08,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:08,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230246902] [2021-05-22 01:57:08,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:08,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:08,993 INFO L87 Difference]: Start difference. First operand 1080 states and 4159 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:09,050 INFO L93 Difference]: Finished difference Result 2170 states and 7829 transitions. [2021-05-22 01:57:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:09,054 INFO L225 Difference]: With dead ends: 2170 [2021-05-22 01:57:09,054 INFO L226 Difference]: Without dead ends: 1981 [2021-05-22 01:57:09,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-05-22 01:57:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1149. [2021-05-22 01:57:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.837108013937282) internal successors, (4405), 1148 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 4405 transitions. [2021-05-22 01:57:09,078 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 4405 transitions. Word has length 25 [2021-05-22 01:57:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:09,078 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 4405 transitions. [2021-05-22 01:57:09,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 4405 transitions. [2021-05-22 01:57:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:09,080 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:09,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:09,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable635 [2021-05-22 01:57:09,080 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:09,080 INFO L82 PathProgramCache]: Analyzing trace with hash 660047485, now seen corresponding path program 632 times [2021-05-22 01:57:09,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:09,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376503107] [2021-05-22 01:57:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:09,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:09,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376503107] [2021-05-22 01:57:09,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376503107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:09,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:09,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:09,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192549222] [2021-05-22 01:57:09,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:09,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:09,155 INFO L87 Difference]: Start difference. First operand 1149 states and 4405 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:09,213 INFO L93 Difference]: Finished difference Result 2168 states and 7794 transitions. [2021-05-22 01:57:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:09,217 INFO L225 Difference]: With dead ends: 2168 [2021-05-22 01:57:09,217 INFO L226 Difference]: Without dead ends: 1951 [2021-05-22 01:57:09,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-05-22 01:57:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1119. [2021-05-22 01:57:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.8434704830053668) internal successors, (4297), 1118 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4297 transitions. [2021-05-22 01:57:09,239 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4297 transitions. Word has length 25 [2021-05-22 01:57:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:09,239 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 4297 transitions. [2021-05-22 01:57:09,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4297 transitions. [2021-05-22 01:57:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:09,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:09,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:09,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636 [2021-05-22 01:57:09,241 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1165842529, now seen corresponding path program 633 times [2021-05-22 01:57:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857826425] [2021-05-22 01:57:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:09,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:09,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857826425] [2021-05-22 01:57:09,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857826425] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:09,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:09,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:09,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416381137] [2021-05-22 01:57:09,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:09,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:09,316 INFO L87 Difference]: Start difference. First operand 1119 states and 4297 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:09,375 INFO L93 Difference]: Finished difference Result 2176 states and 7827 transitions. [2021-05-22 01:57:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:09,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:09,379 INFO L225 Difference]: With dead ends: 2176 [2021-05-22 01:57:09,379 INFO L226 Difference]: Without dead ends: 1987 [2021-05-22 01:57:09,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-05-22 01:57:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1182. [2021-05-22 01:57:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.8137171888230315) internal successors, (4504), 1181 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 4504 transitions. [2021-05-22 01:57:09,401 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 4504 transitions. Word has length 25 [2021-05-22 01:57:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:09,401 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 4504 transitions. [2021-05-22 01:57:09,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 4504 transitions. [2021-05-22 01:57:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:09,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:09,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:09,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637 [2021-05-22 01:57:09,403 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1721630817, now seen corresponding path program 634 times [2021-05-22 01:57:09,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:09,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611325699] [2021-05-22 01:57:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:09,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:09,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611325699] [2021-05-22 01:57:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611325699] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611986988] [2021-05-22 01:57:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:09,487 INFO L87 Difference]: Start difference. First operand 1182 states and 4504 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:09,532 INFO L93 Difference]: Finished difference Result 2081 states and 7525 transitions. [2021-05-22 01:57:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:09,535 INFO L225 Difference]: With dead ends: 2081 [2021-05-22 01:57:09,535 INFO L226 Difference]: Without dead ends: 1796 [2021-05-22 01:57:09,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-05-22 01:57:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1119. [2021-05-22 01:57:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.815742397137746) internal successors, (4266), 1118 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4266 transitions. [2021-05-22 01:57:09,557 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4266 transitions. Word has length 25 [2021-05-22 01:57:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:09,557 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 4266 transitions. [2021-05-22 01:57:09,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4266 transitions. [2021-05-22 01:57:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:09,558 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:09,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:09,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-05-22 01:57:09,558 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash -183494915, now seen corresponding path program 635 times [2021-05-22 01:57:09,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:09,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426600431] [2021-05-22 01:57:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:09,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:09,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426600431] [2021-05-22 01:57:09,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426600431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658636318] [2021-05-22 01:57:09,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:09,638 INFO L87 Difference]: Start difference. First operand 1119 states and 4266 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:09,698 INFO L93 Difference]: Finished difference Result 2157 states and 7740 transitions. [2021-05-22 01:57:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:09,702 INFO L225 Difference]: With dead ends: 2157 [2021-05-22 01:57:09,702 INFO L226 Difference]: Without dead ends: 1970 [2021-05-22 01:57:09,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-05-22 01:57:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1165. [2021-05-22 01:57:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.799828178694158) internal successors, (4423), 1164 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 4423 transitions. [2021-05-22 01:57:09,726 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 4423 transitions. Word has length 25 [2021-05-22 01:57:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:09,726 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 4423 transitions. [2021-05-22 01:57:09,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 4423 transitions. [2021-05-22 01:57:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:09,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:09,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-05-22 01:57:09,728 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1754082783, now seen corresponding path program 636 times [2021-05-22 01:57:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313776850] [2021-05-22 01:57:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:09,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313776850] [2021-05-22 01:57:09,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313776850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:09,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:09,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107575762] [2021-05-22 01:57:09,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:09,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:09,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:09,807 INFO L87 Difference]: Start difference. First operand 1165 states and 4423 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:09,853 INFO L93 Difference]: Finished difference Result 2064 states and 7444 transitions. [2021-05-22 01:57:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:09,856 INFO L225 Difference]: With dead ends: 2064 [2021-05-22 01:57:09,856 INFO L226 Difference]: Without dead ends: 1757 [2021-05-22 01:57:09,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-05-22 01:57:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1080. [2021-05-22 01:57:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.836886005560704) internal successors, (4140), 1079 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 4140 transitions. [2021-05-22 01:57:09,877 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 4140 transitions. Word has length 25 [2021-05-22 01:57:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:09,877 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 4140 transitions. [2021-05-22 01:57:09,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 4140 transitions. [2021-05-22 01:57:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:09,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:09,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:09,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-05-22 01:57:09,879 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1846636413, now seen corresponding path program 637 times [2021-05-22 01:57:09,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:09,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987195520] [2021-05-22 01:57:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:09,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:09,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987195520] [2021-05-22 01:57:09,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987195520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:09,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:09,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:09,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621637398] [2021-05-22 01:57:09,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:09,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:09,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:09,953 INFO L87 Difference]: Start difference. First operand 1080 states and 4140 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,011 INFO L93 Difference]: Finished difference Result 2149 states and 7748 transitions. [2021-05-22 01:57:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,014 INFO L225 Difference]: With dead ends: 2149 [2021-05-22 01:57:10,014 INFO L226 Difference]: Without dead ends: 1960 [2021-05-22 01:57:10,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-05-22 01:57:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1138. [2021-05-22 01:57:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.832014072119613) internal successors, (4357), 1137 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 4357 transitions. [2021-05-22 01:57:10,037 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 4357 transitions. Word has length 25 [2021-05-22 01:57:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:10,037 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 4357 transitions. [2021-05-22 01:57:10,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 4357 transitions. [2021-05-22 01:57:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:10,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:10,038 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:10,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641 [2021-05-22 01:57:10,038 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1255864451, now seen corresponding path program 638 times [2021-05-22 01:57:10,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:10,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197505944] [2021-05-22 01:57:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:10,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:10,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197505944] [2021-05-22 01:57:10,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197505944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:10,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:10,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:10,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059394829] [2021-05-22 01:57:10,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:10,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:10,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:10,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:10,113 INFO L87 Difference]: Start difference. First operand 1138 states and 4357 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,170 INFO L93 Difference]: Finished difference Result 2143 states and 7703 transitions. [2021-05-22 01:57:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,174 INFO L225 Difference]: With dead ends: 2143 [2021-05-22 01:57:10,174 INFO L226 Difference]: Without dead ends: 1932 [2021-05-22 01:57:10,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-05-22 01:57:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1110. [2021-05-22 01:57:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 3.836789900811542) internal successors, (4255), 1109 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4255 transitions. [2021-05-22 01:57:10,196 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4255 transitions. Word has length 25 [2021-05-22 01:57:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:10,196 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 4255 transitions. [2021-05-22 01:57:10,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4255 transitions. [2021-05-22 01:57:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:10,197 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:10,197 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:10,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable642 [2021-05-22 01:57:10,197 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash 536055391, now seen corresponding path program 639 times [2021-05-22 01:57:10,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:10,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923246122] [2021-05-22 01:57:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:10,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:10,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923246122] [2021-05-22 01:57:10,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923246122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:10,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:10,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:10,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912514822] [2021-05-22 01:57:10,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:10,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:10,278 INFO L87 Difference]: Start difference. First operand 1110 states and 4255 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,335 INFO L93 Difference]: Finished difference Result 2161 states and 7766 transitions. [2021-05-22 01:57:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,339 INFO L225 Difference]: With dead ends: 2161 [2021-05-22 01:57:10,339 INFO L226 Difference]: Without dead ends: 1972 [2021-05-22 01:57:10,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-05-22 01:57:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1173. [2021-05-22 01:57:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.8071672354948807) internal successors, (4462), 1172 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 4462 transitions. [2021-05-22 01:57:10,362 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 4462 transitions. Word has length 25 [2021-05-22 01:57:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:10,362 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 4462 transitions. [2021-05-22 01:57:10,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 4462 transitions. [2021-05-22 01:57:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:10,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:10,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:10,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643 [2021-05-22 01:57:10,364 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 550274941, now seen corresponding path program 640 times [2021-05-22 01:57:10,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:10,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009619174] [2021-05-22 01:57:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:10,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:10,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009619174] [2021-05-22 01:57:10,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009619174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:10,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:10,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:10,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378822824] [2021-05-22 01:57:10,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:10,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:10,441 INFO L87 Difference]: Start difference. First operand 1173 states and 4462 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,484 INFO L93 Difference]: Finished difference Result 2066 states and 7464 transitions. [2021-05-22 01:57:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,487 INFO L225 Difference]: With dead ends: 2066 [2021-05-22 01:57:10,487 INFO L226 Difference]: Without dead ends: 1781 [2021-05-22 01:57:10,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-05-22 01:57:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1110. [2021-05-22 01:57:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 3.8097385031559963) internal successors, (4225), 1109 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4225 transitions. [2021-05-22 01:57:10,508 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4225 transitions. Word has length 25 [2021-05-22 01:57:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:10,508 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 4225 transitions. [2021-05-22 01:57:10,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4225 transitions. [2021-05-22 01:57:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:10,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:10,510 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:10,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644 [2021-05-22 01:57:10,510 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:10,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1502502781, now seen corresponding path program 641 times [2021-05-22 01:57:10,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:10,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170496065] [2021-05-22 01:57:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:10,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:10,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170496065] [2021-05-22 01:57:10,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170496065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:10,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:10,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:10,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752476617] [2021-05-22 01:57:10,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:10,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:10,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:10,594 INFO L87 Difference]: Start difference. First operand 1110 states and 4225 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,648 INFO L93 Difference]: Finished difference Result 2136 states and 7661 transitions. [2021-05-22 01:57:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,652 INFO L225 Difference]: With dead ends: 2136 [2021-05-22 01:57:10,652 INFO L226 Difference]: Without dead ends: 1953 [2021-05-22 01:57:10,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-05-22 01:57:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1154. [2021-05-22 01:57:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.7961838681699915) internal successors, (4377), 1153 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 4377 transitions. [2021-05-22 01:57:10,674 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 4377 transitions. Word has length 25 [2021-05-22 01:57:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:10,674 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 4377 transitions. [2021-05-22 01:57:10,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 4377 transitions. [2021-05-22 01:57:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:10,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:10,676 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:10,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645 [2021-05-22 01:57:10,676 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 432983775, now seen corresponding path program 642 times [2021-05-22 01:57:10,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:10,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956097755] [2021-05-22 01:57:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:10,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956097755] [2021-05-22 01:57:10,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956097755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:10,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:10,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:10,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105227614] [2021-05-22 01:57:10,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:10,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:10,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:10,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:10,761 INFO L87 Difference]: Start difference. First operand 1154 states and 4377 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,803 INFO L93 Difference]: Finished difference Result 2047 states and 7379 transitions. [2021-05-22 01:57:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,806 INFO L225 Difference]: With dead ends: 2047 [2021-05-22 01:57:10,806 INFO L226 Difference]: Without dead ends: 1751 [2021-05-22 01:57:10,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-05-22 01:57:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1080. [2021-05-22 01:57:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.822984244670992) internal successors, (4125), 1079 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 4125 transitions. [2021-05-22 01:57:10,829 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 4125 transitions. Word has length 25 [2021-05-22 01:57:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:10,829 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 4125 transitions. [2021-05-22 01:57:10,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 4125 transitions. [2021-05-22 01:57:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:10,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:10,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:10,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646 [2021-05-22 01:57:10,830 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1475934373, now seen corresponding path program 643 times [2021-05-22 01:57:10,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:10,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380611588] [2021-05-22 01:57:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:10,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380611588] [2021-05-22 01:57:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380611588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781630338] [2021-05-22 01:57:10,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:10,927 INFO L87 Difference]: Start difference. First operand 1080 states and 4125 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:10,984 INFO L93 Difference]: Finished difference Result 2118 states and 7639 transitions. [2021-05-22 01:57:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:10,988 INFO L225 Difference]: With dead ends: 2118 [2021-05-22 01:57:10,988 INFO L226 Difference]: Without dead ends: 1931 [2021-05-22 01:57:10,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-05-22 01:57:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1130. [2021-05-22 01:57:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.821080602302923) internal successors, (4314), 1129 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 4314 transitions. [2021-05-22 01:57:11,010 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 4314 transitions. Word has length 25 [2021-05-22 01:57:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,010 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 4314 transitions. [2021-05-22 01:57:11,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 4314 transitions. [2021-05-22 01:57:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647 [2021-05-22 01:57:11,012 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash -394871747, now seen corresponding path program 644 times [2021-05-22 01:57:11,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946714324] [2021-05-22 01:57:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:11,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:11,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946714324] [2021-05-22 01:57:11,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946714324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:11,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:11,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:11,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001314728] [2021-05-22 01:57:11,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:11,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:11,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:11,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:11,086 INFO L87 Difference]: Start difference. First operand 1130 states and 4314 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:11,143 INFO L93 Difference]: Finished difference Result 2114 states and 7599 transitions. [2021-05-22 01:57:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:11,147 INFO L225 Difference]: With dead ends: 2114 [2021-05-22 01:57:11,147 INFO L226 Difference]: Without dead ends: 1903 [2021-05-22 01:57:11,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-05-22 01:57:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1102. [2021-05-22 01:57:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.8256130790190737) internal successors, (4212), 1101 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 4212 transitions. [2021-05-22 01:57:11,168 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 4212 transitions. Word has length 25 [2021-05-22 01:57:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,168 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 4212 transitions. [2021-05-22 01:57:11,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 4212 transitions. [2021-05-22 01:57:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-05-22 01:57:11,170 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1508451901, now seen corresponding path program 645 times [2021-05-22 01:57:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419276355] [2021-05-22 01:57:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:11,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:11,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419276355] [2021-05-22 01:57:11,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419276355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:11,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:11,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594931325] [2021-05-22 01:57:11,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:11,244 INFO L87 Difference]: Start difference. First operand 1102 states and 4212 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:11,302 INFO L93 Difference]: Finished difference Result 2115 states and 7611 transitions. [2021-05-22 01:57:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:11,306 INFO L225 Difference]: With dead ends: 2115 [2021-05-22 01:57:11,306 INFO L226 Difference]: Without dead ends: 1928 [2021-05-22 01:57:11,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-22 01:57:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1148. [2021-05-22 01:57:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.809067131647777) internal successors, (4369), 1147 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4369 transitions. [2021-05-22 01:57:11,328 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4369 transitions. Word has length 25 [2021-05-22 01:57:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,328 INFO L482 AbstractCegarLoop]: Abstraction has 1148 states and 4369 transitions. [2021-05-22 01:57:11,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4369 transitions. [2021-05-22 01:57:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-05-22 01:57:11,329 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash -278929859, now seen corresponding path program 646 times [2021-05-22 01:57:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617021309] [2021-05-22 01:57:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:11,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:11,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617021309] [2021-05-22 01:57:11,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617021309] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:11,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:11,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:11,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680611871] [2021-05-22 01:57:11,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:11,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:11,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:11,405 INFO L87 Difference]: Start difference. First operand 1148 states and 4369 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:11,452 INFO L93 Difference]: Finished difference Result 2022 states and 7315 transitions. [2021-05-22 01:57:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:11,456 INFO L225 Difference]: With dead ends: 2022 [2021-05-22 01:57:11,456 INFO L226 Difference]: Without dead ends: 1754 [2021-05-22 01:57:11,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-05-22 01:57:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1102. [2021-05-22 01:57:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.8056312443233424) internal successors, (4190), 1101 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 4190 transitions. [2021-05-22 01:57:11,476 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 4190 transitions. Word has length 25 [2021-05-22 01:57:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,476 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 4190 transitions. [2021-05-22 01:57:11,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 4190 transitions. [2021-05-22 01:57:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,478 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650 [2021-05-22 01:57:11,478 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1896456863, now seen corresponding path program 647 times [2021-05-22 01:57:11,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339390439] [2021-05-22 01:57:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:11,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:11,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339390439] [2021-05-22 01:57:11,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339390439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:11,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:11,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:11,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144758998] [2021-05-22 01:57:11,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:11,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:11,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:11,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:11,562 INFO L87 Difference]: Start difference. First operand 1102 states and 4190 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:11,622 INFO L93 Difference]: Finished difference Result 2109 states and 7570 transitions. [2021-05-22 01:57:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:11,625 INFO L225 Difference]: With dead ends: 2109 [2021-05-22 01:57:11,625 INFO L226 Difference]: Without dead ends: 1926 [2021-05-22 01:57:11,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-22 01:57:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1146. [2021-05-22 01:57:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.7921397379912665) internal successors, (4342), 1145 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 4342 transitions. [2021-05-22 01:57:11,647 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 4342 transitions. Word has length 25 [2021-05-22 01:57:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,647 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 4342 transitions. [2021-05-22 01:57:11,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 4342 transitions. [2021-05-22 01:57:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,649 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651 [2021-05-22 01:57:11,649 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1193861251, now seen corresponding path program 648 times [2021-05-22 01:57:11,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457735822] [2021-05-22 01:57:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:11,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457735822] [2021-05-22 01:57:11,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457735822] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:11,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:11,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:11,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903449840] [2021-05-22 01:57:11,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:11,734 INFO L87 Difference]: Start difference. First operand 1146 states and 4342 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:11,779 INFO L93 Difference]: Finished difference Result 2020 states and 7288 transitions. [2021-05-22 01:57:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:11,782 INFO L225 Difference]: With dead ends: 2020 [2021-05-22 01:57:11,782 INFO L226 Difference]: Without dead ends: 1709 [2021-05-22 01:57:11,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-05-22 01:57:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1057. [2021-05-22 01:57:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.847537878787879) internal successors, (4063), 1056 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 4063 transitions. [2021-05-22 01:57:11,802 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 4063 transitions. Word has length 25 [2021-05-22 01:57:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,802 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 4063 transitions. [2021-05-22 01:57:11,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 4063 transitions. [2021-05-22 01:57:11,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,804 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable652 [2021-05-22 01:57:11,804 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1725712387, now seen corresponding path program 649 times [2021-05-22 01:57:11,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663856222] [2021-05-22 01:57:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:11,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:11,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663856222] [2021-05-22 01:57:11,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663856222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:11,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:11,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:11,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147019277] [2021-05-22 01:57:11,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:11,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:11,877 INFO L87 Difference]: Start difference. First operand 1057 states and 4063 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:11,949 INFO L93 Difference]: Finished difference Result 2000 states and 7196 transitions. [2021-05-22 01:57:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:11,953 INFO L225 Difference]: With dead ends: 2000 [2021-05-22 01:57:11,953 INFO L226 Difference]: Without dead ends: 1811 [2021-05-22 01:57:11,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-05-22 01:57:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1087. [2021-05-22 01:57:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.826887661141805) internal successors, (4156), 1086 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 4156 transitions. [2021-05-22 01:57:11,984 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 4156 transitions. Word has length 25 [2021-05-22 01:57:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:11,984 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 4156 transitions. [2021-05-22 01:57:11,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 4156 transitions. [2021-05-22 01:57:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:11,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:11,986 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:11,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable653 [2021-05-22 01:57:11,986 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash 525917915, now seen corresponding path program 650 times [2021-05-22 01:57:11,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:11,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532382288] [2021-05-22 01:57:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:12,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:12,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532382288] [2021-05-22 01:57:12,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532382288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:12,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:12,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:12,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106867840] [2021-05-22 01:57:12,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:12,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:12,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:12,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:12,079 INFO L87 Difference]: Start difference. First operand 1087 states and 4156 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:12,154 INFO L93 Difference]: Finished difference Result 1998 states and 7161 transitions. [2021-05-22 01:57:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:12,158 INFO L225 Difference]: With dead ends: 1998 [2021-05-22 01:57:12,158 INFO L226 Difference]: Without dead ends: 1781 [2021-05-22 01:57:12,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:12,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-05-22 01:57:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1057. [2021-05-22 01:57:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.836174242424242) internal successors, (4051), 1056 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 4051 transitions. [2021-05-22 01:57:12,187 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 4051 transitions. Word has length 25 [2021-05-22 01:57:12,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:12,187 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 4051 transitions. [2021-05-22 01:57:12,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 4051 transitions. [2021-05-22 01:57:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:12,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:12,189 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:12,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654 [2021-05-22 01:57:12,189 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1773228029, now seen corresponding path program 651 times [2021-05-22 01:57:12,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:12,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414598899] [2021-05-22 01:57:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:12,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:12,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414598899] [2021-05-22 01:57:12,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414598899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:12,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:12,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957151874] [2021-05-22 01:57:12,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:12,288 INFO L87 Difference]: Start difference. First operand 1057 states and 4051 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:12,346 INFO L93 Difference]: Finished difference Result 1982 states and 7121 transitions. [2021-05-22 01:57:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:12,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:12,349 INFO L225 Difference]: With dead ends: 1982 [2021-05-22 01:57:12,349 INFO L226 Difference]: Without dead ends: 1793 [2021-05-22 01:57:12,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-05-22 01:57:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1081. [2021-05-22 01:57:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.821296296296296) internal successors, (4127), 1080 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 4127 transitions. [2021-05-22 01:57:12,370 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 4127 transitions. Word has length 25 [2021-05-22 01:57:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:12,371 INFO L482 AbstractCegarLoop]: Abstraction has 1081 states and 4127 transitions. [2021-05-22 01:57:12,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 4127 transitions. [2021-05-22 01:57:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:12,372 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:12,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:12,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655 [2021-05-22 01:57:12,372 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1965950979, now seen corresponding path program 652 times [2021-05-22 01:57:12,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:12,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667783800] [2021-05-22 01:57:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:12,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:12,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667783800] [2021-05-22 01:57:12,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667783800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:12,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:12,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:12,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503576928] [2021-05-22 01:57:12,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:12,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:12,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:12,455 INFO L87 Difference]: Start difference. First operand 1081 states and 4127 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:12,514 INFO L93 Difference]: Finished difference Result 1968 states and 7052 transitions. [2021-05-22 01:57:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:12,517 INFO L225 Difference]: With dead ends: 1968 [2021-05-22 01:57:12,517 INFO L226 Difference]: Without dead ends: 1769 [2021-05-22 01:57:12,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-05-22 01:57:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1057. [2021-05-22 01:57:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.824810606060606) internal successors, (4039), 1056 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 4039 transitions. [2021-05-22 01:57:12,538 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 4039 transitions. Word has length 25 [2021-05-22 01:57:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:12,538 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 4039 transitions. [2021-05-22 01:57:12,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 4039 transitions. [2021-05-22 01:57:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:12,539 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:12,539 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:12,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656 [2021-05-22 01:57:12,539 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1539391653, now seen corresponding path program 653 times [2021-05-22 01:57:12,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:12,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431611872] [2021-05-22 01:57:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:12,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431611872] [2021-05-22 01:57:12,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431611872] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:12,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:12,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204839004] [2021-05-22 01:57:12,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:12,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:12,613 INFO L87 Difference]: Start difference. First operand 1057 states and 4039 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:12,669 INFO L93 Difference]: Finished difference Result 1978 states and 7099 transitions. [2021-05-22 01:57:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:12,673 INFO L225 Difference]: With dead ends: 1978 [2021-05-22 01:57:12,673 INFO L226 Difference]: Without dead ends: 1791 [2021-05-22 01:57:12,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-05-22 01:57:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1081. [2021-05-22 01:57:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.810185185185185) internal successors, (4115), 1080 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 4115 transitions. [2021-05-22 01:57:12,693 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 4115 transitions. Word has length 25 [2021-05-22 01:57:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:12,693 INFO L482 AbstractCegarLoop]: Abstraction has 1081 states and 4115 transitions. [2021-05-22 01:57:12,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 4115 transitions. [2021-05-22 01:57:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:12,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:12,695 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:12,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657 [2021-05-22 01:57:12,695 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1746199619, now seen corresponding path program 654 times [2021-05-22 01:57:12,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:12,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020777354] [2021-05-22 01:57:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:12,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:12,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020777354] [2021-05-22 01:57:12,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020777354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:12,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:12,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:12,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471133600] [2021-05-22 01:57:12,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:12,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:12,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:12,768 INFO L87 Difference]: Start difference. First operand 1081 states and 4115 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:12,824 INFO L93 Difference]: Finished difference Result 1966 states and 7035 transitions. [2021-05-22 01:57:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:12,827 INFO L225 Difference]: With dead ends: 1966 [2021-05-22 01:57:12,827 INFO L226 Difference]: Without dead ends: 1755 [2021-05-22 01:57:12,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-05-22 01:57:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1045. [2021-05-22 01:57:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.832375478927203) internal successors, (4001), 1044 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 4001 transitions. [2021-05-22 01:57:12,848 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 4001 transitions. Word has length 25 [2021-05-22 01:57:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:12,848 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 4001 transitions. [2021-05-22 01:57:12,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 4001 transitions. [2021-05-22 01:57:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:12,849 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:12,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658 [2021-05-22 01:57:12,849 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1834794719, now seen corresponding path program 655 times [2021-05-22 01:57:12,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:12,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221053487] [2021-05-22 01:57:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:12,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221053487] [2021-05-22 01:57:12,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221053487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:12,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:12,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:12,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863350078] [2021-05-22 01:57:12,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:12,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:12,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:12,925 INFO L87 Difference]: Start difference. First operand 1045 states and 4001 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:12,980 INFO L93 Difference]: Finished difference Result 2066 states and 7395 transitions. [2021-05-22 01:57:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:12,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:12,984 INFO L225 Difference]: With dead ends: 2066 [2021-05-22 01:57:12,984 INFO L226 Difference]: Without dead ends: 1877 [2021-05-22 01:57:12,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-05-22 01:57:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1045. [2021-05-22 01:57:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.803639846743295) internal successors, (3971), 1044 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3971 transitions. [2021-05-22 01:57:13,005 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3971 transitions. Word has length 25 [2021-05-22 01:57:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,005 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3971 transitions. [2021-05-22 01:57:13,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3971 transitions. [2021-05-22 01:57:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659 [2021-05-22 01:57:13,006 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -208542275, now seen corresponding path program 656 times [2021-05-22 01:57:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6096952] [2021-05-22 01:57:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:13,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:13,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6096952] [2021-05-22 01:57:13,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6096952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:13,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:13,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:13,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661060561] [2021-05-22 01:57:13,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:13,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:13,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:13,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:13,081 INFO L87 Difference]: Start difference. First operand 1045 states and 3971 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:13,140 INFO L93 Difference]: Finished difference Result 2064 states and 7360 transitions. [2021-05-22 01:57:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:13,143 INFO L225 Difference]: With dead ends: 2064 [2021-05-22 01:57:13,143 INFO L226 Difference]: Without dead ends: 1847 [2021-05-22 01:57:13,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-05-22 01:57:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1015. [2021-05-22 01:57:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.809664694280079) internal successors, (3863), 1014 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3863 transitions. [2021-05-22 01:57:13,175 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3863 transitions. Word has length 25 [2021-05-22 01:57:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,175 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3863 transitions. [2021-05-22 01:57:13,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3863 transitions. [2021-05-22 01:57:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660 [2021-05-22 01:57:13,177 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 292204541, now seen corresponding path program 657 times [2021-05-22 01:57:13,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063596315] [2021-05-22 01:57:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063596315] [2021-05-22 01:57:13,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063596315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:13,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:13,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:13,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269070235] [2021-05-22 01:57:13,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:13,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:13,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:13,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:13,254 INFO L87 Difference]: Start difference. First operand 1015 states and 3863 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:13,309 INFO L93 Difference]: Finished difference Result 2072 states and 7393 transitions. [2021-05-22 01:57:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:13,312 INFO L225 Difference]: With dead ends: 2072 [2021-05-22 01:57:13,313 INFO L226 Difference]: Without dead ends: 1883 [2021-05-22 01:57:13,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-05-22 01:57:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1078. [2021-05-22 01:57:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.7790157845868153) internal successors, (4070), 1077 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 4070 transitions. [2021-05-22 01:57:13,333 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 4070 transitions. Word has length 25 [2021-05-22 01:57:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,333 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 4070 transitions. [2021-05-22 01:57:13,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 4070 transitions. [2021-05-22 01:57:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661 [2021-05-22 01:57:13,335 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash -263583747, now seen corresponding path program 658 times [2021-05-22 01:57:13,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398554489] [2021-05-22 01:57:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:13,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398554489] [2021-05-22 01:57:13,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398554489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:13,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:13,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610894372] [2021-05-22 01:57:13,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:13,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:13,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:13,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:13,411 INFO L87 Difference]: Start difference. First operand 1078 states and 4070 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:13,457 INFO L93 Difference]: Finished difference Result 1977 states and 7091 transitions. [2021-05-22 01:57:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:13,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:13,461 INFO L225 Difference]: With dead ends: 1977 [2021-05-22 01:57:13,461 INFO L226 Difference]: Without dead ends: 1692 [2021-05-22 01:57:13,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-05-22 01:57:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1015. [2021-05-22 01:57:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.7790927021696255) internal successors, (3832), 1014 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3832 transitions. [2021-05-22 01:57:13,480 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3832 transitions. Word has length 25 [2021-05-22 01:57:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,480 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3832 transitions. [2021-05-22 01:57:13,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3832 transitions. [2021-05-22 01:57:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,481 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,481 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662 [2021-05-22 01:57:13,481 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1274552155, now seen corresponding path program 659 times [2021-05-22 01:57:13,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884739490] [2021-05-22 01:57:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:13,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:13,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884739490] [2021-05-22 01:57:13,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884739490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:13,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:13,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:13,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474572633] [2021-05-22 01:57:13,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:13,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:13,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:13,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:13,557 INFO L87 Difference]: Start difference. First operand 1015 states and 3832 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:13,616 INFO L93 Difference]: Finished difference Result 2053 states and 7306 transitions. [2021-05-22 01:57:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:13,620 INFO L225 Difference]: With dead ends: 2053 [2021-05-22 01:57:13,620 INFO L226 Difference]: Without dead ends: 1866 [2021-05-22 01:57:13,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-05-22 01:57:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1061. [2021-05-22 01:57:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 3.763207547169811) internal successors, (3989), 1060 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 3989 transitions. [2021-05-22 01:57:13,641 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 3989 transitions. Word has length 25 [2021-05-22 01:57:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,642 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 3989 transitions. [2021-05-22 01:57:13,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 3989 transitions. [2021-05-22 01:57:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable663 [2021-05-22 01:57:13,643 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1082837443, now seen corresponding path program 660 times [2021-05-22 01:57:13,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357529712] [2021-05-22 01:57:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:13,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:13,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357529712] [2021-05-22 01:57:13,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357529712] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:13,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:13,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:13,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717724322] [2021-05-22 01:57:13,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:13,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:13,719 INFO L87 Difference]: Start difference. First operand 1061 states and 3989 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:13,765 INFO L93 Difference]: Finished difference Result 1960 states and 7010 transitions. [2021-05-22 01:57:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:13,768 INFO L225 Difference]: With dead ends: 1960 [2021-05-22 01:57:13,768 INFO L226 Difference]: Without dead ends: 1653 [2021-05-22 01:57:13,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-05-22 01:57:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 976. [2021-05-22 01:57:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.802051282051282) internal successors, (3707), 975 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3707 transitions. [2021-05-22 01:57:13,786 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3707 transitions. Word has length 25 [2021-05-22 01:57:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,787 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3707 transitions. [2021-05-22 01:57:13,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3707 transitions. [2021-05-22 01:57:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,788 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664 [2021-05-22 01:57:13,788 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1407215619, now seen corresponding path program 661 times [2021-05-22 01:57:13,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434593245] [2021-05-22 01:57:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:13,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434593245] [2021-05-22 01:57:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434593245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:13,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:13,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:13,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500791508] [2021-05-22 01:57:13,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:13,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:13,879 INFO L87 Difference]: Start difference. First operand 976 states and 3707 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:13,937 INFO L93 Difference]: Finished difference Result 1957 states and 6997 transitions. [2021-05-22 01:57:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:13,940 INFO L225 Difference]: With dead ends: 1957 [2021-05-22 01:57:13,940 INFO L226 Difference]: Without dead ends: 1768 [2021-05-22 01:57:13,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-05-22 01:57:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1028. [2021-05-22 01:57:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.8003894839337877) internal successors, (3903), 1027 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3903 transitions. [2021-05-22 01:57:13,960 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3903 transitions. Word has length 25 [2021-05-22 01:57:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:13,960 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3903 transitions. [2021-05-22 01:57:13,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3903 transitions. [2021-05-22 01:57:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:13,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:13,961 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:13,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665 [2021-05-22 01:57:13,962 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:13,962 INFO L82 PathProgramCache]: Analyzing trace with hash -851427331, now seen corresponding path program 662 times [2021-05-22 01:57:13,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:13,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131566365] [2021-05-22 01:57:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:14,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:14,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131566365] [2021-05-22 01:57:14,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131566365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:14,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:14,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:14,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096267847] [2021-05-22 01:57:14,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:14,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:14,052 INFO L87 Difference]: Start difference. First operand 1028 states and 3903 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:14,107 INFO L93 Difference]: Finished difference Result 1943 states and 6928 transitions. [2021-05-22 01:57:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:14,110 INFO L225 Difference]: With dead ends: 1943 [2021-05-22 01:57:14,110 INFO L226 Difference]: Without dead ends: 1744 [2021-05-22 01:57:14,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-05-22 01:57:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1004. [2021-05-22 01:57:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.8035892323030907) internal successors, (3815), 1003 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3815 transitions. [2021-05-22 01:57:14,130 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3815 transitions. Word has length 25 [2021-05-22 01:57:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:14,130 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 3815 transitions. [2021-05-22 01:57:14,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3815 transitions. [2021-05-22 01:57:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:14,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:14,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:14,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666 [2021-05-22 01:57:14,131 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2024738977, now seen corresponding path program 663 times [2021-05-22 01:57:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:14,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324202724] [2021-05-22 01:57:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:14,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:14,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324202724] [2021-05-22 01:57:14,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324202724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:14,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:14,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:14,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728366208] [2021-05-22 01:57:14,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:14,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:14,214 INFO L87 Difference]: Start difference. First operand 1004 states and 3815 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:14,266 INFO L93 Difference]: Finished difference Result 1918 states and 6823 transitions. [2021-05-22 01:57:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:14,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:14,269 INFO L225 Difference]: With dead ends: 1918 [2021-05-22 01:57:14,269 INFO L226 Difference]: Without dead ends: 1729 [2021-05-22 01:57:14,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-05-22 01:57:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1067. [2021-05-22 01:57:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.772983114446529) internal successors, (4022), 1066 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4022 transitions. [2021-05-22 01:57:14,288 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4022 transitions. Word has length 25 [2021-05-22 01:57:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:14,288 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4022 transitions. [2021-05-22 01:57:14,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4022 transitions. [2021-05-22 01:57:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:14,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:14,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:14,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667 [2021-05-22 01:57:14,290 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash -741236739, now seen corresponding path program 664 times [2021-05-22 01:57:14,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:14,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997046383] [2021-05-22 01:57:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:14,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:14,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997046383] [2021-05-22 01:57:14,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997046383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:14,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:14,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:14,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045293170] [2021-05-22 01:57:14,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:14,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:14,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:14,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:14,376 INFO L87 Difference]: Start difference. First operand 1067 states and 4022 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:14,415 INFO L93 Difference]: Finished difference Result 1823 states and 6521 transitions. [2021-05-22 01:57:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:14,418 INFO L225 Difference]: With dead ends: 1823 [2021-05-22 01:57:14,418 INFO L226 Difference]: Without dead ends: 1538 [2021-05-22 01:57:14,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-05-22 01:57:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1004. [2021-05-22 01:57:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.7756729810568297) internal successors, (3787), 1003 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3787 transitions. [2021-05-22 01:57:14,437 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3787 transitions. Word has length 25 [2021-05-22 01:57:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:14,437 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 3787 transitions. [2021-05-22 01:57:14,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3787 transitions. [2021-05-22 01:57:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:14,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:14,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:14,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668 [2021-05-22 01:57:14,438 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1906939901, now seen corresponding path program 665 times [2021-05-22 01:57:14,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:14,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600934086] [2021-05-22 01:57:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:14,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:14,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600934086] [2021-05-22 01:57:14,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600934086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:14,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:14,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:14,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291316087] [2021-05-22 01:57:14,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:14,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:14,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:14,542 INFO L87 Difference]: Start difference. First operand 1004 states and 3787 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:14,602 INFO L93 Difference]: Finished difference Result 1753 states and 6291 transitions. [2021-05-22 01:57:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:14,606 INFO L225 Difference]: With dead ends: 1753 [2021-05-22 01:57:14,606 INFO L226 Difference]: Without dead ends: 1578 [2021-05-22 01:57:14,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-05-22 01:57:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1044. [2021-05-22 01:57:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.7651006711409396) internal successors, (3927), 1043 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3927 transitions. [2021-05-22 01:57:14,633 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3927 transitions. Word has length 25 [2021-05-22 01:57:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:14,633 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3927 transitions. [2021-05-22 01:57:14,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3927 transitions. [2021-05-22 01:57:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:14,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:14,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:14,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669 [2021-05-22 01:57:14,635 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2125291487, now seen corresponding path program 666 times [2021-05-22 01:57:14,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:14,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783145167] [2021-05-22 01:57:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:14,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783145167] [2021-05-22 01:57:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783145167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:14,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:14,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79709943] [2021-05-22 01:57:14,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:14,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:14,752 INFO L87 Difference]: Start difference. First operand 1044 states and 3927 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:14,801 INFO L93 Difference]: Finished difference Result 1577 states and 5706 transitions. [2021-05-22 01:57:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:14,804 INFO L225 Difference]: With dead ends: 1577 [2021-05-22 01:57:14,804 INFO L226 Difference]: Without dead ends: 1287 [2021-05-22 01:57:14,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-05-22 01:57:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 976. [2021-05-22 01:57:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.787692307692308) internal successors, (3693), 975 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3693 transitions. [2021-05-22 01:57:14,827 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3693 transitions. Word has length 25 [2021-05-22 01:57:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:14,828 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3693 transitions. [2021-05-22 01:57:14,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3693 transitions. [2021-05-22 01:57:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:14,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:14,829 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:14,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670 [2021-05-22 01:57:14,830 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:14,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:14,830 INFO L82 PathProgramCache]: Analyzing trace with hash -434819109, now seen corresponding path program 667 times [2021-05-22 01:57:14,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:14,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772028303] [2021-05-22 01:57:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:14,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:14,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772028303] [2021-05-22 01:57:14,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772028303] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:14,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:14,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:14,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007066290] [2021-05-22 01:57:14,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:14,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:14,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:14,909 INFO L87 Difference]: Start difference. First operand 976 states and 3693 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:14,970 INFO L93 Difference]: Finished difference Result 1928 states and 6894 transitions. [2021-05-22 01:57:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:14,973 INFO L225 Difference]: With dead ends: 1928 [2021-05-22 01:57:14,973 INFO L226 Difference]: Without dead ends: 1741 [2021-05-22 01:57:14,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-05-22 01:57:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1020. [2021-05-22 01:57:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.78900883218842) internal successors, (3861), 1019 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3861 transitions. [2021-05-22 01:57:14,993 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3861 transitions. Word has length 25 [2021-05-22 01:57:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:14,993 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3861 transitions. [2021-05-22 01:57:14,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3861 transitions. [2021-05-22 01:57:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:14,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:14,994 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:14,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671 [2021-05-22 01:57:14,994 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash -641627075, now seen corresponding path program 668 times [2021-05-22 01:57:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:14,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550904154] [2021-05-22 01:57:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:15,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:15,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550904154] [2021-05-22 01:57:15,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550904154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:15,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:15,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445670620] [2021-05-22 01:57:15,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:15,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:15,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:15,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:15,068 INFO L87 Difference]: Start difference. First operand 1020 states and 3861 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:15,122 INFO L93 Difference]: Finished difference Result 1916 states and 6830 transitions. [2021-05-22 01:57:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:15,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:15,125 INFO L225 Difference]: With dead ends: 1916 [2021-05-22 01:57:15,125 INFO L226 Difference]: Without dead ends: 1717 [2021-05-22 01:57:15,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-05-22 01:57:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 996. [2021-05-22 01:57:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.791959798994975) internal successors, (3773), 995 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3773 transitions. [2021-05-22 01:57:15,145 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3773 transitions. Word has length 25 [2021-05-22 01:57:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:15,145 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3773 transitions. [2021-05-22 01:57:15,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3773 transitions. [2021-05-22 01:57:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:15,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:15,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:15,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672 [2021-05-22 01:57:15,146 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1052342467, now seen corresponding path program 669 times [2021-05-22 01:57:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:15,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075363841] [2021-05-22 01:57:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:15,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:15,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075363841] [2021-05-22 01:57:15,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075363841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:15,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:15,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:15,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046024583] [2021-05-22 01:57:15,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:15,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:15,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:15,222 INFO L87 Difference]: Start difference. First operand 996 states and 3773 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:15,275 INFO L93 Difference]: Finished difference Result 1891 states and 6725 transitions. [2021-05-22 01:57:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:15,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:15,278 INFO L225 Difference]: With dead ends: 1891 [2021-05-22 01:57:15,278 INFO L226 Difference]: Without dead ends: 1704 [2021-05-22 01:57:15,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2021-05-22 01:57:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1042. [2021-05-22 01:57:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.7752161383285303) internal successors, (3930), 1041 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3930 transitions. [2021-05-22 01:57:15,297 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3930 transitions. Word has length 25 [2021-05-22 01:57:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:15,297 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3930 transitions. [2021-05-22 01:57:15,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3930 transitions. [2021-05-22 01:57:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:15,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:15,298 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:15,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673 [2021-05-22 01:57:15,299 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:15,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1570441539, now seen corresponding path program 670 times [2021-05-22 01:57:15,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:15,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468792726] [2021-05-22 01:57:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:15,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:15,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468792726] [2021-05-22 01:57:15,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468792726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:15,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:15,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:15,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544149662] [2021-05-22 01:57:15,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:15,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:15,375 INFO L87 Difference]: Start difference. First operand 1042 states and 3930 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:15,428 INFO L93 Difference]: Finished difference Result 1798 states and 6429 transitions. [2021-05-22 01:57:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:15,431 INFO L225 Difference]: With dead ends: 1798 [2021-05-22 01:57:15,431 INFO L226 Difference]: Without dead ends: 1530 [2021-05-22 01:57:15,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-05-22 01:57:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 996. [2021-05-22 01:57:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.771859296482412) internal successors, (3753), 995 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3753 transitions. [2021-05-22 01:57:15,449 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3753 transitions. Word has length 25 [2021-05-22 01:57:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:15,449 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3753 transitions. [2021-05-22 01:57:15,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3753 transitions. [2021-05-22 01:57:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:15,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:15,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:15,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674 [2021-05-22 01:57:15,451 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1649701535, now seen corresponding path program 671 times [2021-05-22 01:57:15,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:15,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230946589] [2021-05-22 01:57:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:15,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:15,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230946589] [2021-05-22 01:57:15,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230946589] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:15,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:15,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:15,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903566343] [2021-05-22 01:57:15,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:15,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:15,555 INFO L87 Difference]: Start difference. First operand 996 states and 3753 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:15,617 INFO L93 Difference]: Finished difference Result 1745 states and 6257 transitions. [2021-05-22 01:57:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:15,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:15,620 INFO L225 Difference]: With dead ends: 1745 [2021-05-22 01:57:15,620 INFO L226 Difference]: Without dead ends: 1570 [2021-05-22 01:57:15,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-05-22 01:57:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1036. [2021-05-22 01:57:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.761352657004831) internal successors, (3893), 1035 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3893 transitions. [2021-05-22 01:57:15,639 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3893 transitions. Word has length 25 [2021-05-22 01:57:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:15,639 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3893 transitions. [2021-05-22 01:57:15,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3893 transitions. [2021-05-22 01:57:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:15,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:15,640 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:15,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable675 [2021-05-22 01:57:15,640 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash -171333891, now seen corresponding path program 672 times [2021-05-22 01:57:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:15,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122197371] [2021-05-22 01:57:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:15,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122197371] [2021-05-22 01:57:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122197371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:15,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:15,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:15,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124720785] [2021-05-22 01:57:15,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:15,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:15,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:15,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:15,724 INFO L87 Difference]: Start difference. First operand 1036 states and 3893 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:15,761 INFO L93 Difference]: Finished difference Result 1569 states and 5672 transitions. [2021-05-22 01:57:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:15,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:15,763 INFO L225 Difference]: With dead ends: 1569 [2021-05-22 01:57:15,764 INFO L226 Difference]: Without dead ends: 1269 [2021-05-22 01:57:15,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-05-22 01:57:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 958. [2021-05-22 01:57:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.806687565308255) internal successors, (3643), 957 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3643 transitions. [2021-05-22 01:57:15,781 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3643 transitions. Word has length 25 [2021-05-22 01:57:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:15,781 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3643 transitions. [2021-05-22 01:57:15,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3643 transitions. [2021-05-22 01:57:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:15,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:15,782 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:15,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676 [2021-05-22 01:57:15,782 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash 739430491, now seen corresponding path program 673 times [2021-05-22 01:57:15,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:15,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667738891] [2021-05-22 01:57:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:15,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:15,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667738891] [2021-05-22 01:57:15,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667738891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:15,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:15,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:15,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567413499] [2021-05-22 01:57:15,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:15,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:15,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:15,855 INFO L87 Difference]: Start difference. First operand 958 states and 3643 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:15,906 INFO L93 Difference]: Finished difference Result 1805 states and 6424 transitions. [2021-05-22 01:57:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:15,909 INFO L225 Difference]: With dead ends: 1805 [2021-05-22 01:57:15,909 INFO L226 Difference]: Without dead ends: 1616 [2021-05-22 01:57:15,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-05-22 01:57:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 986. [2021-05-22 01:57:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.7878172588832486) internal successors, (3731), 985 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3731 transitions. [2021-05-22 01:57:15,928 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3731 transitions. Word has length 25 [2021-05-22 01:57:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:15,928 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3731 transitions. [2021-05-22 01:57:15,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3731 transitions. [2021-05-22 01:57:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:15,929 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:15,929 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:15,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677 [2021-05-22 01:57:15,930 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1931896923, now seen corresponding path program 674 times [2021-05-22 01:57:15,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:15,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975387343] [2021-05-22 01:57:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975387343] [2021-05-22 01:57:16,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975387343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110815596] [2021-05-22 01:57:16,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,002 INFO L87 Difference]: Start difference. First operand 986 states and 3731 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,053 INFO L93 Difference]: Finished difference Result 1799 states and 6379 transitions. [2021-05-22 01:57:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,056 INFO L225 Difference]: With dead ends: 1799 [2021-05-22 01:57:16,056 INFO L226 Difference]: Without dead ends: 1588 [2021-05-22 01:57:16,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-05-22 01:57:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 958. [2021-05-22 01:57:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.794148380355277) internal successors, (3631), 957 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3631 transitions. [2021-05-22 01:57:16,074 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3631 transitions. Word has length 25 [2021-05-22 01:57:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,074 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3631 transitions. [2021-05-22 01:57:16,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3631 transitions. [2021-05-22 01:57:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678 [2021-05-22 01:57:16,075 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash 258528445, now seen corresponding path program 675 times [2021-05-22 01:57:16,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156494701] [2021-05-22 01:57:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156494701] [2021-05-22 01:57:16,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156494701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254945386] [2021-05-22 01:57:16,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,159 INFO L87 Difference]: Start difference. First operand 958 states and 3631 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,209 INFO L93 Difference]: Finished difference Result 1793 states and 6368 transitions. [2021-05-22 01:57:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,213 INFO L225 Difference]: With dead ends: 1793 [2021-05-22 01:57:16,213 INFO L226 Difference]: Without dead ends: 1604 [2021-05-22 01:57:16,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-05-22 01:57:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 982. [2021-05-22 01:57:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.778797145769623) internal successors, (3707), 981 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3707 transitions. [2021-05-22 01:57:16,231 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3707 transitions. Word has length 25 [2021-05-22 01:57:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,231 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3707 transitions. [2021-05-22 01:57:16,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3707 transitions. [2021-05-22 01:57:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,232 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679 [2021-05-22 01:57:16,232 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash -667121573, now seen corresponding path program 676 times [2021-05-22 01:57:16,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262146263] [2021-05-22 01:57:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262146263] [2021-05-22 01:57:16,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262146263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308144380] [2021-05-22 01:57:16,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,316 INFO L87 Difference]: Start difference. First operand 982 states and 3707 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,369 INFO L93 Difference]: Finished difference Result 1779 states and 6299 transitions. [2021-05-22 01:57:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,372 INFO L225 Difference]: With dead ends: 1779 [2021-05-22 01:57:16,372 INFO L226 Difference]: Without dead ends: 1580 [2021-05-22 01:57:16,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-05-22 01:57:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 958. [2021-05-22 01:57:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.781609195402299) internal successors, (3619), 957 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3619 transitions. [2021-05-22 01:57:16,390 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3619 transitions. Word has length 25 [2021-05-22 01:57:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,390 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3619 transitions. [2021-05-22 01:57:16,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3619 transitions. [2021-05-22 01:57:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680 [2021-05-22 01:57:16,392 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -826470309, now seen corresponding path program 677 times [2021-05-22 01:57:16,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735601201] [2021-05-22 01:57:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735601201] [2021-05-22 01:57:16,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735601201] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963954256] [2021-05-22 01:57:16,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,466 INFO L87 Difference]: Start difference. First operand 958 states and 3619 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,515 INFO L93 Difference]: Finished difference Result 1781 states and 6322 transitions. [2021-05-22 01:57:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,518 INFO L225 Difference]: With dead ends: 1781 [2021-05-22 01:57:16,518 INFO L226 Difference]: Without dead ends: 1598 [2021-05-22 01:57:16,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-05-22 01:57:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 982. [2021-05-22 01:57:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.7665647298674823) internal successors, (3695), 981 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3695 transitions. [2021-05-22 01:57:16,536 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3695 transitions. Word has length 25 [2021-05-22 01:57:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,536 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3695 transitions. [2021-05-22 01:57:16,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3695 transitions. [2021-05-22 01:57:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,538 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681 [2021-05-22 01:57:16,538 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash 254592317, now seen corresponding path program 678 times [2021-05-22 01:57:16,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81247782] [2021-05-22 01:57:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81247782] [2021-05-22 01:57:16,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81247782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803687270] [2021-05-22 01:57:16,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,611 INFO L87 Difference]: Start difference. First operand 982 states and 3695 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,662 INFO L93 Difference]: Finished difference Result 1773 states and 6270 transitions. [2021-05-22 01:57:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,665 INFO L225 Difference]: With dead ends: 1773 [2021-05-22 01:57:16,665 INFO L226 Difference]: Without dead ends: 1562 [2021-05-22 01:57:16,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-05-22 01:57:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 946. [2021-05-22 01:57:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.7894179894179896) internal successors, (3581), 945 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3581 transitions. [2021-05-22 01:57:16,683 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3581 transitions. Word has length 25 [2021-05-22 01:57:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,683 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3581 transitions. [2021-05-22 01:57:16,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3581 transitions. [2021-05-22 01:57:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,684 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682 [2021-05-22 01:57:16,684 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 4970301, now seen corresponding path program 679 times [2021-05-22 01:57:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178952766] [2021-05-22 01:57:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178952766] [2021-05-22 01:57:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178952766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800189490] [2021-05-22 01:57:16,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,758 INFO L87 Difference]: Start difference. First operand 946 states and 3581 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,814 INFO L93 Difference]: Finished difference Result 1832 states and 6485 transitions. [2021-05-22 01:57:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,817 INFO L225 Difference]: With dead ends: 1832 [2021-05-22 01:57:16,817 INFO L226 Difference]: Without dead ends: 1643 [2021-05-22 01:57:16,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-05-22 01:57:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 946. [2021-05-22 01:57:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.75978835978836) internal successors, (3553), 945 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3553 transitions. [2021-05-22 01:57:16,835 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3553 transitions. Word has length 25 [2021-05-22 01:57:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,835 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3553 transitions. [2021-05-22 01:57:16,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3553 transitions. [2021-05-22 01:57:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,836 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683 [2021-05-22 01:57:16,836 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1197436733, now seen corresponding path program 680 times [2021-05-22 01:57:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291965798] [2021-05-22 01:57:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:16,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:16,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291965798] [2021-05-22 01:57:16,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291965798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:16,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:16,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:16,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734393854] [2021-05-22 01:57:16,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:16,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:16,911 INFO L87 Difference]: Start difference. First operand 946 states and 3553 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:16,963 INFO L93 Difference]: Finished difference Result 1826 states and 6440 transitions. [2021-05-22 01:57:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:16,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:16,966 INFO L225 Difference]: With dead ends: 1826 [2021-05-22 01:57:16,966 INFO L226 Difference]: Without dead ends: 1615 [2021-05-22 01:57:16,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-05-22 01:57:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 918. [2021-05-22 01:57:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.763358778625954) internal successors, (3451), 917 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3451 transitions. [2021-05-22 01:57:16,984 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3451 transitions. Word has length 25 [2021-05-22 01:57:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:16,984 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 3451 transitions. [2021-05-22 01:57:16,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3451 transitions. [2021-05-22 01:57:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:16,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:16,985 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:16,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684 [2021-05-22 01:57:16,985 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1021026109, now seen corresponding path program 681 times [2021-05-22 01:57:16,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:16,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875347439] [2021-05-22 01:57:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:17,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:17,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875347439] [2021-05-22 01:57:17,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875347439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:17,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:17,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:17,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934924188] [2021-05-22 01:57:17,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:17,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:17,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:17,061 INFO L87 Difference]: Start difference. First operand 918 states and 3451 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:17,112 INFO L93 Difference]: Finished difference Result 1844 states and 6503 transitions. [2021-05-22 01:57:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:17,116 INFO L225 Difference]: With dead ends: 1844 [2021-05-22 01:57:17,116 INFO L226 Difference]: Without dead ends: 1655 [2021-05-22 01:57:17,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-05-22 01:57:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 981. [2021-05-22 01:57:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.73265306122449) internal successors, (3658), 980 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3658 transitions. [2021-05-22 01:57:17,134 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3658 transitions. Word has length 25 [2021-05-22 01:57:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:17,134 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3658 transitions. [2021-05-22 01:57:17,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3658 transitions. [2021-05-22 01:57:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:17,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:17,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:17,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685 [2021-05-22 01:57:17,135 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1035245659, now seen corresponding path program 682 times [2021-05-22 01:57:17,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:17,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735059190] [2021-05-22 01:57:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:17,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:17,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735059190] [2021-05-22 01:57:17,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735059190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:17,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:17,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930968771] [2021-05-22 01:57:17,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:17,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:17,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:17,211 INFO L87 Difference]: Start difference. First operand 981 states and 3658 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:17,254 INFO L93 Difference]: Finished difference Result 1749 states and 6201 transitions. [2021-05-22 01:57:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:17,257 INFO L225 Difference]: With dead ends: 1749 [2021-05-22 01:57:17,257 INFO L226 Difference]: Without dead ends: 1464 [2021-05-22 01:57:17,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-05-22 01:57:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 918. [2021-05-22 01:57:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.7306434023991275) internal successors, (3421), 917 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3421 transitions. [2021-05-22 01:57:17,274 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3421 transitions. Word has length 25 [2021-05-22 01:57:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:17,274 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 3421 transitions. [2021-05-22 01:57:17,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3421 transitions. [2021-05-22 01:57:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:17,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:17,275 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:17,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable686 [2021-05-22 01:57:17,275 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1987473499, now seen corresponding path program 683 times [2021-05-22 01:57:17,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:17,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815876877] [2021-05-22 01:57:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:17,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:17,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815876877] [2021-05-22 01:57:17,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815876877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:17,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:17,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389036098] [2021-05-22 01:57:17,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:17,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:17,359 INFO L87 Difference]: Start difference. First operand 918 states and 3421 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:17,415 INFO L93 Difference]: Finished difference Result 1819 states and 6398 transitions. [2021-05-22 01:57:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:17,419 INFO L225 Difference]: With dead ends: 1819 [2021-05-22 01:57:17,419 INFO L226 Difference]: Without dead ends: 1636 [2021-05-22 01:57:17,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-05-22 01:57:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 962. [2021-05-22 01:57:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 3.718002081165453) internal successors, (3573), 961 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 3573 transitions. [2021-05-22 01:57:17,437 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 3573 transitions. Word has length 25 [2021-05-22 01:57:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 962 states and 3573 transitions. [2021-05-22 01:57:17,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 3573 transitions. [2021-05-22 01:57:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:17,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:17,439 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:17,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687 [2021-05-22 01:57:17,439 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash 917954493, now seen corresponding path program 684 times [2021-05-22 01:57:17,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:17,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050074263] [2021-05-22 01:57:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:17,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050074263] [2021-05-22 01:57:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050074263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:17,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:17,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:17,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587881569] [2021-05-22 01:57:17,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:17,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:17,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:17,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:17,533 INFO L87 Difference]: Start difference. First operand 962 states and 3573 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:17,572 INFO L93 Difference]: Finished difference Result 1730 states and 6116 transitions. [2021-05-22 01:57:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:17,575 INFO L225 Difference]: With dead ends: 1730 [2021-05-22 01:57:17,575 INFO L226 Difference]: Without dead ends: 1434 [2021-05-22 01:57:17,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-05-22 01:57:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 888. [2021-05-22 01:57:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.745208568207441) internal successors, (3322), 887 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3322 transitions. [2021-05-22 01:57:17,591 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3322 transitions. Word has length 25 [2021-05-22 01:57:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:17,591 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3322 transitions. [2021-05-22 01:57:17,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3322 transitions. [2021-05-22 01:57:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:17,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:17,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:17,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable688 [2021-05-22 01:57:17,593 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash -784415969, now seen corresponding path program 685 times [2021-05-22 01:57:17,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:17,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015849432] [2021-05-22 01:57:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:17,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:17,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015849432] [2021-05-22 01:57:17,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015849432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:17,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:17,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:17,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449980760] [2021-05-22 01:57:17,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:17,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:17,686 INFO L87 Difference]: Start difference. First operand 888 states and 3322 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:17,738 INFO L93 Difference]: Finished difference Result 1692 states and 5933 transitions. [2021-05-22 01:57:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:17,741 INFO L225 Difference]: With dead ends: 1692 [2021-05-22 01:57:17,741 INFO L226 Difference]: Without dead ends: 1503 [2021-05-22 01:57:17,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-05-22 01:57:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 888. [2021-05-22 01:57:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.7181510710259302) internal successors, (3298), 887 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3298 transitions. [2021-05-22 01:57:17,765 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3298 transitions. Word has length 25 [2021-05-22 01:57:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:17,766 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3298 transitions. [2021-05-22 01:57:17,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3298 transitions. [2021-05-22 01:57:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:17,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:17,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:17,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689 [2021-05-22 01:57:17,767 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1710065987, now seen corresponding path program 686 times [2021-05-22 01:57:17,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:17,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141468919] [2021-05-22 01:57:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:17,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:17,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141468919] [2021-05-22 01:57:17,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141468919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:17,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:17,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:17,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660727351] [2021-05-22 01:57:17,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:17,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:17,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:17,862 INFO L87 Difference]: Start difference. First operand 888 states and 3298 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:17,913 INFO L93 Difference]: Finished difference Result 1678 states and 5864 transitions. [2021-05-22 01:57:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:17,916 INFO L225 Difference]: With dead ends: 1678 [2021-05-22 01:57:17,916 INFO L226 Difference]: Without dead ends: 1479 [2021-05-22 01:57:17,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-05-22 01:57:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 864. [2021-05-22 01:57:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.719582850521437) internal successors, (3210), 863 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 3210 transitions. [2021-05-22 01:57:17,933 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 3210 transitions. Word has length 25 [2021-05-22 01:57:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:17,933 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 3210 transitions. [2021-05-22 01:57:17,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 3210 transitions. [2021-05-22 01:57:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:17,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:17,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:17,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690 [2021-05-22 01:57:17,934 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1547196413, now seen corresponding path program 687 times [2021-05-22 01:57:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:17,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737132473] [2021-05-22 01:57:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737132473] [2021-05-22 01:57:18,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737132473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692391088] [2021-05-22 01:57:18,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,017 INFO L87 Difference]: Start difference. First operand 864 states and 3210 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,069 INFO L93 Difference]: Finished difference Result 1653 states and 5759 transitions. [2021-05-22 01:57:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,071 INFO L225 Difference]: With dead ends: 1653 [2021-05-22 01:57:18,071 INFO L226 Difference]: Without dead ends: 1464 [2021-05-22 01:57:18,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-05-22 01:57:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 802. [2021-05-22 01:57:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.6928838951310863) internal successors, (2958), 801 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2958 transitions. [2021-05-22 01:57:18,086 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2958 transitions. Word has length 25 [2021-05-22 01:57:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,087 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2958 transitions. [2021-05-22 01:57:18,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2958 transitions. [2021-05-22 01:57:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,088 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,088 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691 [2021-05-22 01:57:18,088 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1550119875, now seen corresponding path program 688 times [2021-05-22 01:57:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231240910] [2021-05-22 01:57:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231240910] [2021-05-22 01:57:18,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231240910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370224178] [2021-05-22 01:57:18,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,171 INFO L87 Difference]: Start difference. First operand 802 states and 2958 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,210 INFO L93 Difference]: Finished difference Result 1558 states and 5457 transitions. [2021-05-22 01:57:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,213 INFO L225 Difference]: With dead ends: 1558 [2021-05-22 01:57:18,213 INFO L226 Difference]: Without dead ends: 1273 [2021-05-22 01:57:18,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-22 01:57:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 739. [2021-05-22 01:57:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.68970189701897) internal successors, (2723), 738 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2723 transitions. [2021-05-22 01:57:18,226 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2723 transitions. Word has length 25 [2021-05-22 01:57:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,226 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2723 transitions. [2021-05-22 01:57:18,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2723 transitions. [2021-05-22 01:57:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692 [2021-05-22 01:57:18,227 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash -929980325, now seen corresponding path program 689 times [2021-05-22 01:57:18,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421897824] [2021-05-22 01:57:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421897824] [2021-05-22 01:57:18,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421897824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145683378] [2021-05-22 01:57:18,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,318 INFO L87 Difference]: Start difference. First operand 739 states and 2723 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,371 INFO L93 Difference]: Finished difference Result 1488 states and 5227 transitions. [2021-05-22 01:57:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,373 INFO L225 Difference]: With dead ends: 1488 [2021-05-22 01:57:18,374 INFO L226 Difference]: Without dead ends: 1313 [2021-05-22 01:57:18,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-05-22 01:57:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 779. [2021-05-22 01:57:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.6799485861182517) internal successors, (2863), 778 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2863 transitions. [2021-05-22 01:57:18,387 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2863 transitions. Word has length 25 [2021-05-22 01:57:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,387 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2863 transitions. [2021-05-22 01:57:18,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2863 transitions. [2021-05-22 01:57:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693 [2021-05-22 01:57:18,388 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash -711628739, now seen corresponding path program 690 times [2021-05-22 01:57:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688702619] [2021-05-22 01:57:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688702619] [2021-05-22 01:57:18,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688702619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362994797] [2021-05-22 01:57:18,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,492 INFO L87 Difference]: Start difference. First operand 779 states and 2863 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,531 INFO L93 Difference]: Finished difference Result 1312 states and 4642 transitions. [2021-05-22 01:57:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,533 INFO L225 Difference]: With dead ends: 1312 [2021-05-22 01:57:18,533 INFO L226 Difference]: Without dead ends: 1022 [2021-05-22 01:57:18,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-22 01:57:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 711. [2021-05-22 01:57:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.702816901408451) internal successors, (2629), 710 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2629 transitions. [2021-05-22 01:57:18,545 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2629 transitions. Word has length 25 [2021-05-22 01:57:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,545 INFO L482 AbstractCegarLoop]: Abstraction has 711 states and 2629 transitions. [2021-05-22 01:57:18,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2629 transitions. [2021-05-22 01:57:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable694 [2021-05-22 01:57:18,546 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash -30381989, now seen corresponding path program 691 times [2021-05-22 01:57:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895087160] [2021-05-22 01:57:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895087160] [2021-05-22 01:57:18,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895087160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647492234] [2021-05-22 01:57:18,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,626 INFO L87 Difference]: Start difference. First operand 711 states and 2629 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,676 INFO L93 Difference]: Finished difference Result 1477 states and 5238 transitions. [2021-05-22 01:57:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,679 INFO L225 Difference]: With dead ends: 1477 [2021-05-22 01:57:18,679 INFO L226 Difference]: Without dead ends: 1294 [2021-05-22 01:57:18,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-05-22 01:57:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 755. [2021-05-22 01:57:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.7095490716180373) internal successors, (2797), 754 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2797 transitions. [2021-05-22 01:57:18,692 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2797 transitions. Word has length 25 [2021-05-22 01:57:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,692 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2797 transitions. [2021-05-22 01:57:18,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2797 transitions. [2021-05-22 01:57:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable695 [2021-05-22 01:57:18,693 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1050680637, now seen corresponding path program 692 times [2021-05-22 01:57:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388699621] [2021-05-22 01:57:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388699621] [2021-05-22 01:57:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388699621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371367562] [2021-05-22 01:57:18,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,773 INFO L87 Difference]: Start difference. First operand 755 states and 2797 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,824 INFO L93 Difference]: Finished difference Result 1469 states and 5186 transitions. [2021-05-22 01:57:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,826 INFO L225 Difference]: With dead ends: 1469 [2021-05-22 01:57:18,826 INFO L226 Difference]: Without dead ends: 1270 [2021-05-22 01:57:18,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-05-22 01:57:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 731. [2021-05-22 01:57:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.710958904109589) internal successors, (2709), 730 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2709 transitions. [2021-05-22 01:57:18,839 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2709 transitions. Word has length 25 [2021-05-22 01:57:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,839 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2709 transitions. [2021-05-22 01:57:18,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2709 transitions. [2021-05-22 01:57:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,840 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable696 [2021-05-22 01:57:18,841 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -647905347, now seen corresponding path program 693 times [2021-05-22 01:57:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744305781] [2021-05-22 01:57:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:18,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:18,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744305781] [2021-05-22 01:57:18,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744305781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:18,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:18,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:18,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843005029] [2021-05-22 01:57:18,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:18,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:18,931 INFO L87 Difference]: Start difference. First operand 731 states and 2709 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:18,982 INFO L93 Difference]: Finished difference Result 1397 states and 4922 transitions. [2021-05-22 01:57:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:18,984 INFO L225 Difference]: With dead ends: 1397 [2021-05-22 01:57:18,984 INFO L226 Difference]: Without dead ends: 1214 [2021-05-22 01:57:18,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-05-22 01:57:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 775. [2021-05-22 01:57:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.6963824289405687) internal successors, (2861), 774 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2861 transitions. [2021-05-22 01:57:18,997 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2861 transitions. Word has length 25 [2021-05-22 01:57:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:18,997 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2861 transitions. [2021-05-22 01:57:18,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2861 transitions. [2021-05-22 01:57:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:18,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:18,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:18,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable697 [2021-05-22 01:57:18,998 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash 121866173, now seen corresponding path program 694 times [2021-05-22 01:57:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:18,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104977642] [2021-05-22 01:57:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104977642] [2021-05-22 01:57:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104977642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157651254] [2021-05-22 01:57:19,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,089 INFO L87 Difference]: Start difference. First operand 775 states and 2861 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,128 INFO L93 Difference]: Finished difference Result 1308 states and 4640 transitions. [2021-05-22 01:57:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,130 INFO L225 Difference]: With dead ends: 1308 [2021-05-22 01:57:19,130 INFO L226 Difference]: Without dead ends: 1042 [2021-05-22 01:57:19,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-05-22 01:57:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 731. [2021-05-22 01:57:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.6835616438356165) internal successors, (2689), 730 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2689 transitions. [2021-05-22 01:57:19,142 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2689 transitions. Word has length 25 [2021-05-22 01:57:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,142 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2689 transitions. [2021-05-22 01:57:19,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2689 transitions. [2021-05-22 01:57:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:19,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:19,143 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:19,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698 [2021-05-22 01:57:19,143 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -259900385, now seen corresponding path program 695 times [2021-05-22 01:57:19,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:19,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367510148] [2021-05-22 01:57:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367510148] [2021-05-22 01:57:19,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367510148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099912105] [2021-05-22 01:57:19,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,231 INFO L87 Difference]: Start difference. First operand 731 states and 2689 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,284 INFO L93 Difference]: Finished difference Result 1169 states and 4133 transitions. [2021-05-22 01:57:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,286 INFO L225 Difference]: With dead ends: 1169 [2021-05-22 01:57:19,286 INFO L226 Difference]: Without dead ends: 994 [2021-05-22 01:57:19,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-05-22 01:57:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 771. [2021-05-22 01:57:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.674025974025974) internal successors, (2829), 770 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2829 transitions. [2021-05-22 01:57:19,298 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2829 transitions. Word has length 25 [2021-05-22 01:57:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,298 INFO L482 AbstractCegarLoop]: Abstraction has 771 states and 2829 transitions. [2021-05-22 01:57:19,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2829 transitions. [2021-05-22 01:57:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:19,299 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:19,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:19,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699 [2021-05-22 01:57:19,299 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2080935811, now seen corresponding path program 696 times [2021-05-22 01:57:19,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:19,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915971097] [2021-05-22 01:57:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915971097] [2021-05-22 01:57:19,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915971097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115554221] [2021-05-22 01:57:19,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,388 INFO L87 Difference]: Start difference. First operand 771 states and 2829 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,428 INFO L93 Difference]: Finished difference Result 993 states and 3548 transitions. [2021-05-22 01:57:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,429 INFO L225 Difference]: With dead ends: 993 [2021-05-22 01:57:19,429 INFO L226 Difference]: Without dead ends: 697 [2021-05-22 01:57:19,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-05-22 01:57:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2021-05-22 01:57:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7198275862068964) internal successors, (2589), 696 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2589 transitions. [2021-05-22 01:57:19,439 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2589 transitions. Word has length 25 [2021-05-22 01:57:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,439 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2589 transitions. [2021-05-22 01:57:19,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2589 transitions. [2021-05-22 01:57:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:19,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:19,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:19,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700 [2021-05-22 01:57:19,440 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:19,440 INFO L82 PathProgramCache]: Analyzing trace with hash 738750649, now seen corresponding path program 697 times [2021-05-22 01:57:19,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:19,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776974549] [2021-05-22 01:57:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776974549] [2021-05-22 01:57:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776974549] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672352399] [2021-05-22 01:57:19,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,517 INFO L87 Difference]: Start difference. First operand 697 states and 2589 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,567 INFO L93 Difference]: Finished difference Result 1284 states and 4495 transitions. [2021-05-22 01:57:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,569 INFO L225 Difference]: With dead ends: 1284 [2021-05-22 01:57:19,569 INFO L226 Difference]: Without dead ends: 1097 [2021-05-22 01:57:19,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-05-22 01:57:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 725. [2021-05-22 01:57:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 3.697513812154696) internal successors, (2677), 724 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2677 transitions. [2021-05-22 01:57:19,581 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2677 transitions. Word has length 25 [2021-05-22 01:57:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,581 INFO L482 AbstractCegarLoop]: Abstraction has 725 states and 2677 transitions. [2021-05-22 01:57:19,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2677 transitions. [2021-05-22 01:57:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:19,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:19,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:19,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701 [2021-05-22 01:57:19,582 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1819813275, now seen corresponding path program 698 times [2021-05-22 01:57:19,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:19,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904538935] [2021-05-22 01:57:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904538935] [2021-05-22 01:57:19,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904538935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845325477] [2021-05-22 01:57:19,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,658 INFO L87 Difference]: Start difference. First operand 725 states and 2677 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,707 INFO L93 Difference]: Finished difference Result 1280 states and 4455 transitions. [2021-05-22 01:57:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,709 INFO L225 Difference]: With dead ends: 1280 [2021-05-22 01:57:19,709 INFO L226 Difference]: Without dead ends: 1069 [2021-05-22 01:57:19,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-05-22 01:57:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 697. [2021-05-22 01:57:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7025862068965516) internal successors, (2577), 696 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2577 transitions. [2021-05-22 01:57:19,720 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2577 transitions. Word has length 25 [2021-05-22 01:57:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,720 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2577 transitions. [2021-05-22 01:57:19,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2577 transitions. [2021-05-22 01:57:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:19,721 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:19,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:19,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702 [2021-05-22 01:57:19,721 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:19,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:19,722 INFO L82 PathProgramCache]: Analyzing trace with hash 257848603, now seen corresponding path program 699 times [2021-05-22 01:57:19,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:19,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307509783] [2021-05-22 01:57:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307509783] [2021-05-22 01:57:19,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307509783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827043923] [2021-05-22 01:57:19,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,797 INFO L87 Difference]: Start difference. First operand 697 states and 2577 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,846 INFO L93 Difference]: Finished difference Result 1272 states and 4439 transitions. [2021-05-22 01:57:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,848 INFO L225 Difference]: With dead ends: 1272 [2021-05-22 01:57:19,848 INFO L226 Difference]: Without dead ends: 1085 [2021-05-22 01:57:19,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-05-22 01:57:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 721. [2021-05-22 01:57:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.6847222222222222) internal successors, (2653), 720 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2653 transitions. [2021-05-22 01:57:19,860 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2653 transitions. Word has length 25 [2021-05-22 01:57:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,860 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2653 transitions. [2021-05-22 01:57:19,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2653 transitions. [2021-05-22 01:57:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:19,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:19,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:19,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703 [2021-05-22 01:57:19,861 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1430397669, now seen corresponding path program 700 times [2021-05-22 01:57:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:19,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257599933] [2021-05-22 01:57:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:19,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:19,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257599933] [2021-05-22 01:57:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257599933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:19,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:19,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117899957] [2021-05-22 01:57:19,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:19,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:19,935 INFO L87 Difference]: Start difference. First operand 721 states and 2653 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:19,985 INFO L93 Difference]: Finished difference Result 1260 states and 4375 transitions. [2021-05-22 01:57:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:19,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:19,987 INFO L225 Difference]: With dead ends: 1260 [2021-05-22 01:57:19,987 INFO L226 Difference]: Without dead ends: 1061 [2021-05-22 01:57:19,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-05-22 01:57:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 697. [2021-05-22 01:57:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.685344827586207) internal successors, (2565), 696 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2565 transitions. [2021-05-22 01:57:19,999 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2565 transitions. Word has length 25 [2021-05-22 01:57:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:19,999 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2565 transitions. [2021-05-22 01:57:19,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2565 transitions. [2021-05-22 01:57:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704 [2021-05-22 01:57:20,000 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash 645853565, now seen corresponding path program 701 times [2021-05-22 01:57:20,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303158322] [2021-05-22 01:57:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303158322] [2021-05-22 01:57:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303158322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186187890] [2021-05-22 01:57:20,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,075 INFO L87 Difference]: Start difference. First operand 697 states and 2565 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,123 INFO L93 Difference]: Finished difference Result 1264 states and 4403 transitions. [2021-05-22 01:57:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,126 INFO L225 Difference]: With dead ends: 1264 [2021-05-22 01:57:20,126 INFO L226 Difference]: Without dead ends: 1081 [2021-05-22 01:57:20,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-05-22 01:57:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 721. [2021-05-22 01:57:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.6680555555555556) internal successors, (2641), 720 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2641 transitions. [2021-05-22 01:57:20,144 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2641 transitions. Word has length 25 [2021-05-22 01:57:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,144 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2641 transitions. [2021-05-22 01:57:20,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2641 transitions. [2021-05-22 01:57:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705 [2021-05-22 01:57:20,145 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash -200943397, now seen corresponding path program 702 times [2021-05-22 01:57:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853787218] [2021-05-22 01:57:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853787218] [2021-05-22 01:57:20,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853787218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839108651] [2021-05-22 01:57:20,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,221 INFO L87 Difference]: Start difference. First operand 721 states and 2641 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,271 INFO L93 Difference]: Finished difference Result 1256 states and 4351 transitions. [2021-05-22 01:57:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,273 INFO L225 Difference]: With dead ends: 1256 [2021-05-22 01:57:20,273 INFO L226 Difference]: Without dead ends: 1045 [2021-05-22 01:57:20,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-05-22 01:57:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 685. [2021-05-22 01:57:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6944444444444446) internal successors, (2527), 684 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2527 transitions. [2021-05-22 01:57:20,285 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2527 transitions. Word has length 25 [2021-05-22 01:57:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,285 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2527 transitions. [2021-05-22 01:57:20,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2527 transitions. [2021-05-22 01:57:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706 [2021-05-22 01:57:20,286 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash 4290459, now seen corresponding path program 703 times [2021-05-22 01:57:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117929553] [2021-05-22 01:57:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117929553] [2021-05-22 01:57:20,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117929553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884859353] [2021-05-22 01:57:20,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,361 INFO L87 Difference]: Start difference. First operand 685 states and 2527 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,409 INFO L93 Difference]: Finished difference Result 1244 states and 4317 transitions. [2021-05-22 01:57:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,411 INFO L225 Difference]: With dead ends: 1244 [2021-05-22 01:57:20,411 INFO L226 Difference]: Without dead ends: 1057 [2021-05-22 01:57:20,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-05-22 01:57:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 685. [2021-05-22 01:57:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6535087719298245) internal successors, (2499), 684 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2499 transitions. [2021-05-22 01:57:20,423 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2499 transitions. Word has length 25 [2021-05-22 01:57:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,423 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2499 transitions. [2021-05-22 01:57:20,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2499 transitions. [2021-05-22 01:57:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707 [2021-05-22 01:57:20,424 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1085353085, now seen corresponding path program 704 times [2021-05-22 01:57:20,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125843863] [2021-05-22 01:57:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125843863] [2021-05-22 01:57:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125843863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229283697] [2021-05-22 01:57:20,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,499 INFO L87 Difference]: Start difference. First operand 685 states and 2499 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,548 INFO L93 Difference]: Finished difference Result 1240 states and 4277 transitions. [2021-05-22 01:57:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,550 INFO L225 Difference]: With dead ends: 1240 [2021-05-22 01:57:20,550 INFO L226 Difference]: Without dead ends: 1029 [2021-05-22 01:57:20,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-05-22 01:57:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 657. [2021-05-22 01:57:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.653963414634146) internal successors, (2397), 656 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2397 transitions. [2021-05-22 01:57:20,561 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2397 transitions. Word has length 25 [2021-05-22 01:57:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,561 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2397 transitions. [2021-05-22 01:57:20,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2397 transitions. [2021-05-22 01:57:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,562 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708 [2021-05-22 01:57:20,562 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1020346267, now seen corresponding path program 705 times [2021-05-22 01:57:20,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788080931] [2021-05-22 01:57:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788080931] [2021-05-22 01:57:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788080931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142157005] [2021-05-22 01:57:20,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,637 INFO L87 Difference]: Start difference. First operand 657 states and 2397 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,686 INFO L93 Difference]: Finished difference Result 1241 states and 4289 transitions. [2021-05-22 01:57:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,688 INFO L225 Difference]: With dead ends: 1241 [2021-05-22 01:57:20,688 INFO L226 Difference]: Without dead ends: 1054 [2021-05-22 01:57:20,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-05-22 01:57:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 703. [2021-05-22 01:57:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6381766381766383) internal successors, (2554), 702 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2554 transitions. [2021-05-22 01:57:20,699 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2554 transitions. Word has length 25 [2021-05-22 01:57:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2554 transitions. [2021-05-22 01:57:20,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2554 transitions. [2021-05-22 01:57:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709 [2021-05-22 01:57:20,700 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash -767035493, now seen corresponding path program 706 times [2021-05-22 01:57:20,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999983672] [2021-05-22 01:57:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999983672] [2021-05-22 01:57:20,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999983672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949339277] [2021-05-22 01:57:20,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,775 INFO L87 Difference]: Start difference. First operand 703 states and 2554 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,811 INFO L93 Difference]: Finished difference Result 1148 states and 3993 transitions. [2021-05-22 01:57:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,813 INFO L225 Difference]: With dead ends: 1148 [2021-05-22 01:57:20,813 INFO L226 Difference]: Without dead ends: 880 [2021-05-22 01:57:20,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-05-22 01:57:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 657. [2021-05-22 01:57:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.620426829268293) internal successors, (2375), 656 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2375 transitions. [2021-05-22 01:57:20,823 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2375 transitions. Word has length 25 [2021-05-22 01:57:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,823 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2375 transitions. [2021-05-22 01:57:20,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2375 transitions. [2021-05-22 01:57:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710 [2021-05-22 01:57:20,824 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1408351229, now seen corresponding path program 707 times [2021-05-22 01:57:20,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081943400] [2021-05-22 01:57:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:20,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:20,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081943400] [2021-05-22 01:57:20,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081943400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:20,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:20,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:20,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054410595] [2021-05-22 01:57:20,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:20,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:20,910 INFO L87 Difference]: Start difference. First operand 657 states and 2375 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:20,958 INFO L93 Difference]: Finished difference Result 1235 states and 4248 transitions. [2021-05-22 01:57:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:20,960 INFO L225 Difference]: With dead ends: 1235 [2021-05-22 01:57:20,960 INFO L226 Difference]: Without dead ends: 1052 [2021-05-22 01:57:20,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-05-22 01:57:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 701. [2021-05-22 01:57:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.61) internal successors, (2527), 700 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2527 transitions. [2021-05-22 01:57:20,971 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2527 transitions. Word has length 25 [2021-05-22 01:57:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:20,971 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2527 transitions. [2021-05-22 01:57:20,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2527 transitions. [2021-05-22 01:57:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:20,972 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:20,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:20,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711 [2021-05-22 01:57:20,972 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1681966885, now seen corresponding path program 708 times [2021-05-22 01:57:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761360743] [2021-05-22 01:57:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761360743] [2021-05-22 01:57:21,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761360743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902326774] [2021-05-22 01:57:21,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,059 INFO L87 Difference]: Start difference. First operand 701 states and 2527 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,095 INFO L93 Difference]: Finished difference Result 1146 states and 3966 transitions. [2021-05-22 01:57:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,096 INFO L225 Difference]: With dead ends: 1146 [2021-05-22 01:57:21,096 INFO L226 Difference]: Without dead ends: 858 [2021-05-22 01:57:21,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-05-22 01:57:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 635. [2021-05-22 01:57:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.6277602523659307) internal successors, (2300), 634 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2300 transitions. [2021-05-22 01:57:21,106 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2300 transitions. Word has length 25 [2021-05-22 01:57:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,106 INFO L482 AbstractCegarLoop]: Abstraction has 635 states and 2300 transitions. [2021-05-22 01:57:21,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2300 transitions. [2021-05-22 01:57:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,107 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712 [2021-05-22 01:57:21,107 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,108 INFO L82 PathProgramCache]: Analyzing trace with hash -785095811, now seen corresponding path program 709 times [2021-05-22 01:57:21,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399985408] [2021-05-22 01:57:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399985408] [2021-05-22 01:57:21,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399985408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290414157] [2021-05-22 01:57:21,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,181 INFO L87 Difference]: Start difference. First operand 635 states and 2300 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,227 INFO L93 Difference]: Finished difference Result 1126 states and 3846 transitions. [2021-05-22 01:57:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,229 INFO L225 Difference]: With dead ends: 1126 [2021-05-22 01:57:21,229 INFO L226 Difference]: Without dead ends: 939 [2021-05-22 01:57:21,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-05-22 01:57:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 635. [2021-05-22 01:57:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.589905362776025) internal successors, (2276), 634 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2276 transitions. [2021-05-22 01:57:21,239 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2276 transitions. Word has length 25 [2021-05-22 01:57:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,239 INFO L482 AbstractCegarLoop]: Abstraction has 635 states and 2276 transitions. [2021-05-22 01:57:21,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2276 transitions. [2021-05-22 01:57:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713 [2021-05-22 01:57:21,240 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1821625213, now seen corresponding path program 710 times [2021-05-22 01:57:21,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311105895] [2021-05-22 01:57:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311105895] [2021-05-22 01:57:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311105895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108932749] [2021-05-22 01:57:21,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,313 INFO L87 Difference]: Start difference. First operand 635 states and 2276 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,360 INFO L93 Difference]: Finished difference Result 1114 states and 3782 transitions. [2021-05-22 01:57:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,362 INFO L225 Difference]: With dead ends: 1114 [2021-05-22 01:57:21,362 INFO L226 Difference]: Without dead ends: 915 [2021-05-22 01:57:21,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-05-22 01:57:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 611. [2021-05-22 01:57:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 3.586885245901639) internal successors, (2188), 610 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 2188 transitions. [2021-05-22 01:57:21,372 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 2188 transitions. Word has length 25 [2021-05-22 01:57:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,372 INFO L482 AbstractCegarLoop]: Abstraction has 611 states and 2188 transitions. [2021-05-22 01:57:21,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 2188 transitions. [2021-05-22 01:57:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714 [2021-05-22 01:57:21,373 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1546516571, now seen corresponding path program 711 times [2021-05-22 01:57:21,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011135723] [2021-05-22 01:57:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011135723] [2021-05-22 01:57:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011135723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507994291] [2021-05-22 01:57:21,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,450 INFO L87 Difference]: Start difference. First operand 611 states and 2188 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,497 INFO L93 Difference]: Finished difference Result 1089 states and 3677 transitions. [2021-05-22 01:57:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,498 INFO L225 Difference]: With dead ends: 1089 [2021-05-22 01:57:21,498 INFO L226 Difference]: Without dead ends: 902 [2021-05-22 01:57:21,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-05-22 01:57:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 551. [2021-05-22 01:57:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.5309090909090908) internal successors, (1942), 550 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1942 transitions. [2021-05-22 01:57:21,507 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1942 transitions. Word has length 25 [2021-05-22 01:57:21,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,507 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1942 transitions. [2021-05-22 01:57:21,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1942 transitions. [2021-05-22 01:57:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,508 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715 [2021-05-22 01:57:21,508 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,508 INFO L82 PathProgramCache]: Analyzing trace with hash 942566269, now seen corresponding path program 712 times [2021-05-22 01:57:21,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059893734] [2021-05-22 01:57:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059893734] [2021-05-22 01:57:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059893734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190036840] [2021-05-22 01:57:21,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,584 INFO L87 Difference]: Start difference. First operand 551 states and 1942 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,617 INFO L93 Difference]: Finished difference Result 996 states and 3381 transitions. [2021-05-22 01:57:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,619 INFO L225 Difference]: With dead ends: 996 [2021-05-22 01:57:21,619 INFO L226 Difference]: Without dead ends: 728 [2021-05-22 01:57:21,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-05-22 01:57:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 505. [2021-05-22 01:57:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.501984126984127) internal successors, (1765), 504 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1765 transitions. [2021-05-22 01:57:21,626 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1765 transitions. Word has length 25 [2021-05-22 01:57:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,626 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1765 transitions. [2021-05-22 01:57:21,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1765 transitions. [2021-05-22 01:57:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716 [2021-05-22 01:57:21,627 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2134672253, now seen corresponding path program 713 times [2021-05-22 01:57:21,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674984507] [2021-05-22 01:57:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674984507] [2021-05-22 01:57:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674984507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974825552] [2021-05-22 01:57:21,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,712 INFO L87 Difference]: Start difference. First operand 505 states and 1765 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,757 INFO L93 Difference]: Finished difference Result 943 states and 3209 transitions. [2021-05-22 01:57:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,758 INFO L225 Difference]: With dead ends: 943 [2021-05-22 01:57:21,758 INFO L226 Difference]: Without dead ends: 768 [2021-05-22 01:57:21,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-05-22 01:57:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 545. [2021-05-22 01:57:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.5018382352941178) internal successors, (1905), 544 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1905 transitions. [2021-05-22 01:57:21,766 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1905 transitions. Word has length 25 [2021-05-22 01:57:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,766 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1905 transitions. [2021-05-22 01:57:21,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1905 transitions. [2021-05-22 01:57:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717 [2021-05-22 01:57:21,767 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash 313636827, now seen corresponding path program 714 times [2021-05-22 01:57:21,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876274764] [2021-05-22 01:57:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876274764] [2021-05-22 01:57:21,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876274764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350725670] [2021-05-22 01:57:21,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,852 INFO L87 Difference]: Start difference. First operand 545 states and 1905 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:21,883 INFO L93 Difference]: Finished difference Result 767 states and 2624 transitions. [2021-05-22 01:57:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:21,884 INFO L225 Difference]: With dead ends: 767 [2021-05-22 01:57:21,884 INFO L226 Difference]: Without dead ends: 485 [2021-05-22 01:57:21,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-05-22 01:57:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2021-05-22 01:57:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.5020661157024793) internal successors, (1695), 484 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1695 transitions. [2021-05-22 01:57:21,891 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1695 transitions. Word has length 25 [2021-05-22 01:57:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:21,891 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1695 transitions. [2021-05-22 01:57:21,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1695 transitions. [2021-05-22 01:57:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:21,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:21,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:21,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718 [2021-05-22 01:57:21,891 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:21,892 INFO L82 PathProgramCache]: Analyzing trace with hash -705575073, now seen corresponding path program 715 times [2021-05-22 01:57:21,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:21,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420463120] [2021-05-22 01:57:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:21,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:21,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420463120] [2021-05-22 01:57:21,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420463120] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:21,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:21,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:21,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752331484] [2021-05-22 01:57:21,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:21,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:21,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:21,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:21,975 INFO L87 Difference]: Start difference. First operand 485 states and 1695 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:22,019 INFO L93 Difference]: Finished difference Result 796 states and 2668 transitions. [2021-05-22 01:57:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:22,021 INFO L225 Difference]: With dead ends: 796 [2021-05-22 01:57:22,021 INFO L226 Difference]: Without dead ends: 613 [2021-05-22 01:57:22,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-05-22 01:57:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 485. [2021-05-22 01:57:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.4524793388429753) internal successors, (1671), 484 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1671 transitions. [2021-05-22 01:57:22,028 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1671 transitions. Word has length 25 [2021-05-22 01:57:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:22,028 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1671 transitions. [2021-05-22 01:57:22,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1671 transitions. [2021-05-22 01:57:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:22,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:22,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:22,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719 [2021-05-22 01:57:22,029 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1552372035, now seen corresponding path program 716 times [2021-05-22 01:57:22,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:22,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586192713] [2021-05-22 01:57:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:22,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:22,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586192713] [2021-05-22 01:57:22,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586192713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:22,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:22,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:22,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023314701] [2021-05-22 01:57:22,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:22,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:22,113 INFO L87 Difference]: Start difference. First operand 485 states and 1671 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:22,158 INFO L93 Difference]: Finished difference Result 788 states and 2616 transitions. [2021-05-22 01:57:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:22,159 INFO L225 Difference]: With dead ends: 788 [2021-05-22 01:57:22,159 INFO L226 Difference]: Without dead ends: 589 [2021-05-22 01:57:22,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-05-22 01:57:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 461. [2021-05-22 01:57:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.4413043478260867) internal successors, (1583), 460 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1583 transitions. [2021-05-22 01:57:22,166 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1583 transitions. Word has length 25 [2021-05-22 01:57:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:22,166 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1583 transitions. [2021-05-22 01:57:22,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1583 transitions. [2021-05-22 01:57:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:22,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:22,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:22,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720 [2021-05-22 01:57:22,167 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1626037309, now seen corresponding path program 717 times [2021-05-22 01:57:22,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:22,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083299575] [2021-05-22 01:57:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:22,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083299575] [2021-05-22 01:57:22,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083299575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:22,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:22,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:22,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009142480] [2021-05-22 01:57:22,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:22,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:22,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:22,262 INFO L87 Difference]: Start difference. First operand 461 states and 1583 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:22,305 INFO L93 Difference]: Finished difference Result 716 states and 2352 transitions. [2021-05-22 01:57:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:22,306 INFO L225 Difference]: With dead ends: 716 [2021-05-22 01:57:22,306 INFO L226 Difference]: Without dead ends: 533 [2021-05-22 01:57:22,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-22 01:57:22,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 405. [2021-05-22 01:57:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.344059405940594) internal successors, (1351), 404 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1351 transitions. [2021-05-22 01:57:22,312 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1351 transitions. Word has length 25 [2021-05-22 01:57:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:22,312 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1351 transitions. [2021-05-22 01:57:22,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1351 transitions. [2021-05-22 01:57:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:22,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:22,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:22,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721 [2021-05-22 01:57:22,313 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -280849347, now seen corresponding path program 718 times [2021-05-22 01:57:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:22,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853215961] [2021-05-22 01:57:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:22,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:22,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853215961] [2021-05-22 01:57:22,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853215961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:22,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:22,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:22,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879247208] [2021-05-22 01:57:22,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:22,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:22,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:22,408 INFO L87 Difference]: Start difference. First operand 405 states and 1351 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:22,438 INFO L93 Difference]: Finished difference Result 627 states and 2070 transitions. [2021-05-22 01:57:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:22,439 INFO L225 Difference]: With dead ends: 627 [2021-05-22 01:57:22,439 INFO L226 Difference]: Without dead ends: 361 [2021-05-22 01:57:22,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-22 01:57:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2021-05-22 01:57:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.275) internal successors, (1179), 360 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1179 transitions. [2021-05-22 01:57:22,444 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1179 transitions. Word has length 25 [2021-05-22 01:57:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:22,444 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1179 transitions. [2021-05-22 01:57:22,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1179 transitions. [2021-05-22 01:57:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:22,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:22,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:22,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable722 [2021-05-22 01:57:22,444 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash 769289243, now seen corresponding path program 719 times [2021-05-22 01:57:22,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:22,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166462271] [2021-05-22 01:57:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:22,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:22,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166462271] [2021-05-22 01:57:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166462271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:22,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:22,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724224555] [2021-05-22 01:57:22,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:22,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:22,538 INFO L87 Difference]: Start difference. First operand 361 states and 1179 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:22,579 INFO L93 Difference]: Finished difference Result 488 states and 1563 transitions. [2021-05-22 01:57:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:22,580 INFO L225 Difference]: With dead ends: 488 [2021-05-22 01:57:22,580 INFO L226 Difference]: Without dead ends: 313 [2021-05-22 01:57:22,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-22 01:57:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-05-22 01:57:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.1378205128205128) internal successors, (979), 312 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 979 transitions. [2021-05-22 01:57:22,584 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 979 transitions. Word has length 25 [2021-05-22 01:57:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:22,584 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 979 transitions. [2021-05-22 01:57:22,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 979 transitions. [2021-05-22 01:57:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 01:57:22,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:57:22,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:57:22,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723 [2021-05-22 01:57:22,585 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:57:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:57:22,585 INFO L82 PathProgramCache]: Analyzing trace with hash 151765885, now seen corresponding path program 720 times [2021-05-22 01:57:22,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:57:22,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130190717] [2021-05-22 01:57:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:57:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:57:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:57:22,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:57:22,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130190717] [2021-05-22 01:57:22,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130190717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:57:22,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:57:22,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 01:57:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729348079] [2021-05-22 01:57:22,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 01:57:22,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:57:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 01:57:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 01:57:22,685 INFO L87 Difference]: Start difference. First operand 313 states and 979 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:57:22,709 INFO L93 Difference]: Finished difference Result 312 states and 978 transitions. [2021-05-22 01:57:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 01:57:22,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 01:57:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:57:22,709 INFO L225 Difference]: With dead ends: 312 [2021-05-22 01:57:22,709 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:57:22,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:57:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:57:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:57:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:57:22,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-05-22 01:57:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:57:22,710 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:57:22,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:57:22,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:57:22,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724 [2021-05-22 01:57:22,711 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:57:22,712 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-22 01:57:22,713 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:57:22,713 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:57:22,713 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:57:22,713 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:57:22,713 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:57:22,713 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:57:22,713 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:57:22,713 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:57:22,714 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 63 transitions, 264 flow [2021-05-22 01:57:22,885 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4463 states, 4461 states have (on average 4.459314055144587) internal successors, (19893), 4462 states have internal predecessors, (19893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 4463 states, 4461 states have (on average 4.459314055144587) internal successors, (19893), 4462 states have internal predecessors, (19893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:57:22,908 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:57:22,908 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 01:57:22,909 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 01:57:22,911 INFO L202 PluginConnector]: Adding new model example_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 01:57:22 BasicIcfg [2021-05-22 01:57:22,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 01:57:22,912 INFO L168 Benchmark]: Toolchain (without parser) took 140173.74 ms. Allocated memory was 333.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 315.2 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 125.7 MB. Max. memory is 16.0 GB. [2021-05-22 01:57:22,912 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 333.4 MB. Free memory is still 316.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:57:22,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.03 ms. Allocated memory is still 333.4 MB. Free memory was 315.2 MB in the beginning and 313.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 01:57:22,912 INFO L168 Benchmark]: Boogie Preprocessor took 12.20 ms. Allocated memory is still 333.4 MB. Free memory was 313.7 MB in the beginning and 312.8 MB in the end (delta: 876.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:57:22,912 INFO L168 Benchmark]: RCFGBuilder took 210.71 ms. Allocated memory is still 333.4 MB. Free memory was 312.7 MB in the beginning and 302.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-22 01:57:22,912 INFO L168 Benchmark]: TraceAbstraction took 139921.49 ms. Allocated memory was 333.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 301.5 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 111.0 MB. Max. memory is 16.0 GB. [2021-05-22 01:57:22,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 333.4 MB. Free memory is still 316.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.03 ms. Allocated memory is still 333.4 MB. Free memory was 315.2 MB in the beginning and 313.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.20 ms. Allocated memory is still 333.4 MB. Free memory was 313.7 MB in the beginning and 312.8 MB in the end (delta: 876.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 210.71 ms. Allocated memory is still 333.4 MB. Free memory was 312.7 MB in the beginning and 302.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 139921.49 ms. Allocated memory was 333.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 301.5 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 111.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 58 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 139611.4ms, OverallIterations: 725, TraceHistogramMax: 1, EmptinessCheckTime: 1367.4ms, AutomataDifference: 48532.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 437.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 60270 SDtfs, 75844 SDslu, 133269 SDs, 0 SdLazy, 25766 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14467.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5775 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 5045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2880 ImplicationChecksByTransitivity, 72529.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4463occurred in iteration=0, InterpolantAutomatonStates: 5775, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23810.8ms AutomataMinimizationTime, 725 MinimizatonAttempts, 806803 StatesRemovedByMinimization, 714 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 161.5ms SsaConstructionTime, 444.6ms SatisfiabilityAnalysisTime, 62890.9ms InterpolantComputationTime, 18125 NumberOfCodeBlocks, 18125 NumberOfCodeBlocksAsserted, 725 NumberOfCheckSat, 17400 ConstructedInterpolants, 0 QuantifiedInterpolants, 425019 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 725 InterpolantComputations, 725 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 13 procedures, 58 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 195.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 23.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 172.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4463occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...