/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/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:53:41,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:53:41,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:53:41,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 13:53:41,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 13:53:41,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 13:53:41,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 13:53:41,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 13:53:41,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 13:53:41,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 13:53:41,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 13:53:41,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 13:53:41,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 13:53:41,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 13:53:41,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 13:53:41,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 13:53:41,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 13:53:41,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 13:53:41,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 13:53:41,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 13:53:41,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 13:53:41,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 13:53:41,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 13:53:41,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 13:53:41,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 13:53:41,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 13:53:41,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 13:53:41,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 13:53:41,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 13:53:41,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 13:53:41,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 13:53:41,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 13:53:41,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 13:53:41,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 13:53:41,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 13:53:41,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 13:53:41,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 13:53:41,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 13:53:41,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:53:41,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:53:41,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:53:41,483 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 [2021-06-05 13:53:41,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:53:41,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:53:41,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:53:41,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:53:41,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:53:41,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:53:41,506 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:53:41,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:53:41,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:53:41,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:53:41,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:53:41,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:53:41,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:53:41,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:53:41,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:53:41,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:53:41,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:53:41,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:53:41,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:53:41,509 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:53:41,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:53:41,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:53:41,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:53:41,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:53:41,812 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:53:41,813 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:53:41,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-06-05 13:53:41,814 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-06-05 13:53:41,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:53:41,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:53:41,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:53:41,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:53:41,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:53:41,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:53:41,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:53:41,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:53:41,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:53:41,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/1) ... [2021-06-05 13:53:41,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:53:41,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:53:41,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:53:41,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:53:41,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (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 [2021-06-05 13:53:42,013 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:53:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:53:42,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:53:42,013 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:53:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:53:42,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:53:42,014 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:53:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:53:42,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:53:42,015 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:53:42,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:53:42,148 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:53:42,149 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:53:42 BoogieIcfgContainer [2021-06-05 13:53:42,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:53:42,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:53:42,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:53:42,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:53:42,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:53:41" (1/2) ... [2021-06-05 13:53:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f266e3 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:53:42, skipping insertion in model container [2021-06-05 13:53:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:53:42" (2/2) ... [2021-06-05 13:53:42,156 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-06-05 13:53:42,161 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:53:42,161 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:53:42,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:53:42,162 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:53:42,190 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:53:42,208 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:53:42,225 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:53:42,225 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:53:42,225 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:53:42,226 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:53:42,226 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:53:42,226 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:53:42,226 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:53:42,226 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:53:42,234 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-06-05 13:53:42,270 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:53:42,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:42,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:42,305 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:42,310 INFO L82 PathProgramCache]: Analyzing trace with hash 515368400, now seen corresponding path program 1 times [2021-06-05 13:53:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:42,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500388901] [2021-06-05 13:53:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:42,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:42,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500388901] [2021-06-05 13:53:42,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500388901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:42,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:42,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:53:42,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525861860] [2021-06-05 13:53:42,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:53:42,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:53:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:53:42,498 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:42,537 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-06-05 13:53:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:53:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:53:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:42,554 INFO L225 Difference]: With dead ends: 131 [2021-06-05 13:53:42,555 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:53:42,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:53:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:53:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-06-05 13:53:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-06-05 13:53:42,621 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-06-05 13:53:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:42,621 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-06-05 13:53:42,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-06-05 13:53:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:53:42,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:42,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:42,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:53:42,626 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2051020952, now seen corresponding path program 1 times [2021-06-05 13:53:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:42,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744385909] [2021-06-05 13:53:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:42,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:42,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744385909] [2021-06-05 13:53:42,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744385909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:42,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:42,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:53:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318852949] [2021-06-05 13:53:42,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:53:42,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:53:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:53:42,668 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:42,696 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-06-05 13:53:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:53:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:53:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:42,699 INFO L225 Difference]: With dead ends: 136 [2021-06-05 13:53:42,700 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 13:53:42,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:53:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 13:53:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-06-05 13:53:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-06-05 13:53:42,714 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-06-05 13:53:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:42,714 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-06-05 13:53:42,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-06-05 13:53:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:42,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:42,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:42,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:53:42,716 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:42,716 INFO L82 PathProgramCache]: Analyzing trace with hash -124034957, now seen corresponding path program 1 times [2021-06-05 13:53:42,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708547315] [2021-06-05 13:53:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:42,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708547315] [2021-06-05 13:53:42,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708547315] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:42,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:42,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:53:42,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695304146] [2021-06-05 13:53:42,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:53:42,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:53:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:42,861 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:43,005 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-06-05 13:53:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:53:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:43,007 INFO L225 Difference]: With dead ends: 171 [2021-06-05 13:53:43,007 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:53:43,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:53:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-06-05 13:53:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-06-05 13:53:43,014 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-06-05 13:53:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:43,014 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-06-05 13:53:43,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-06-05 13:53:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:43,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:43,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:43,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:53:43,016 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1760059086, now seen corresponding path program 1 times [2021-06-05 13:53:43,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:43,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346774513] [2021-06-05 13:53:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:43,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346774513] [2021-06-05 13:53:43,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346774513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:43,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:43,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:43,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663262935] [2021-06-05 13:53:43,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:43,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:43,109 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:43,232 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-06-05 13:53:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:43,234 INFO L225 Difference]: With dead ends: 189 [2021-06-05 13:53:43,234 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:53:43,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:53:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-06-05 13:53:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1607142857142856) internal successors, (242), 112 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-06-05 13:53:43,241 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-06-05 13:53:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:43,242 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-06-05 13:53:43,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-06-05 13:53:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:43,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:43,243 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:43,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:53:43,244 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1024175242, now seen corresponding path program 2 times [2021-06-05 13:53:43,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531176736] [2021-06-05 13:53:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:43,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531176736] [2021-06-05 13:53:43,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531176736] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:43,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:43,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:43,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329612361] [2021-06-05 13:53:43,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:43,313 INFO L87 Difference]: Start difference. First operand 113 states and 242 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:43,414 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-06-05 13:53:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:43,416 INFO L225 Difference]: With dead ends: 217 [2021-06-05 13:53:43,416 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 13:53:43,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 13:53:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-06-05 13:53:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 13:53:43,422 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-06-05 13:53:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:43,423 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 13:53:43,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 13:53:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:43,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:43,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:43,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:53:43,424 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash -140139653, now seen corresponding path program 2 times [2021-06-05 13:53:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:43,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060508652] [2021-06-05 13:53:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:43,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060508652] [2021-06-05 13:53:43,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060508652] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:43,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:43,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:53:43,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453864329] [2021-06-05 13:53:43,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:53:43,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:53:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:43,492 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:43,578 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-06-05 13:53:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:53:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:43,580 INFO L225 Difference]: With dead ends: 208 [2021-06-05 13:53:43,580 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:53:43,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:53:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-06-05 13:53:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-06-05 13:53:43,592 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-06-05 13:53:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:43,593 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-06-05 13:53:43,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-06-05 13:53:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:43,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:43,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:43,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:53:43,603 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash 753224345, now seen corresponding path program 3 times [2021-06-05 13:53:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:43,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67679313] [2021-06-05 13:53:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:43,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67679313] [2021-06-05 13:53:43,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67679313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:43,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:43,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:53:43,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70950863] [2021-06-05 13:53:43,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:53:43,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:43,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:53:43,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:43,713 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:43,785 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-06-05 13:53:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:53:43,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:43,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:43,787 INFO L225 Difference]: With dead ends: 200 [2021-06-05 13:53:43,787 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 13:53:43,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 13:53:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-06-05 13:53:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-06-05 13:53:43,791 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-06-05 13:53:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:43,792 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-06-05 13:53:43,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-06-05 13:53:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:43,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:43,793 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:43,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:53:43,793 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash 353908316, now seen corresponding path program 3 times [2021-06-05 13:53:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:43,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932291325] [2021-06-05 13:53:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:43,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932291325] [2021-06-05 13:53:43,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932291325] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:43,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:43,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:43,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434129330] [2021-06-05 13:53:43,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:43,864 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,009 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-06-05 13:53:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:53:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,011 INFO L225 Difference]: With dead ends: 217 [2021-06-05 13:53:44,011 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 13:53:44,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 13:53:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-06-05 13:53:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.193548387096774) internal successors, (272), 124 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-06-05 13:53:44,015 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-06-05 13:53:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:44,016 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-06-05 13:53:44,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-06-05 13:53:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:44,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:44,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:44,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:53:44,017 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1247272314, now seen corresponding path program 4 times [2021-06-05 13:53:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:44,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919202566] [2021-06-05 13:53:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919202566] [2021-06-05 13:53:44,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919202566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:44,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:44,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:44,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534889293] [2021-06-05 13:53:44,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:44,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:44,079 INFO L87 Difference]: Start difference. First operand 125 states and 272 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,222 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-06-05 13:53:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:53:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,225 INFO L225 Difference]: With dead ends: 210 [2021-06-05 13:53:44,225 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 13:53:44,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 13:53:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-06-05 13:53:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-06-05 13:53:44,232 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-06-05 13:53:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:44,232 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-06-05 13:53:44,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-06-05 13:53:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:44,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:44,233 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:44,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:53:44,234 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:44,238 INFO L82 PathProgramCache]: Analyzing trace with hash -62451926, now seen corresponding path program 5 times [2021-06-05 13:53:44,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:44,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847596517] [2021-06-05 13:53:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847596517] [2021-06-05 13:53:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847596517] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:44,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123552070] [2021-06-05 13:53:44,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:44,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:44,313 INFO L87 Difference]: Start difference. First operand 110 states and 238 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,416 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-06-05 13:53:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,418 INFO L225 Difference]: With dead ends: 164 [2021-06-05 13:53:44,418 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 13:53:44,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 13:53:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-06-05 13:53:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 13:53:44,423 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-06-05 13:53:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:44,424 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 13:53:44,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 13:53:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:44,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:44,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:44,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:53:44,425 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:44,426 INFO L82 PathProgramCache]: Analyzing trace with hash -732718852, now seen corresponding path program 6 times [2021-06-05 13:53:44,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:44,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881400590] [2021-06-05 13:53:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:44,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881400590] [2021-06-05 13:53:44,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881400590] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:44,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:44,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:44,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424519734] [2021-06-05 13:53:44,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:44,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:44,512 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,624 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-06-05 13:53:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,625 INFO L225 Difference]: With dead ends: 169 [2021-06-05 13:53:44,625 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 13:53:44,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 13:53:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-06-05 13:53:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-06-05 13:53:44,630 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-06-05 13:53:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:44,630 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-06-05 13:53:44,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-06-05 13:53:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:44,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:44,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:44,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 13:53:44,631 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 160645146, now seen corresponding path program 7 times [2021-06-05 13:53:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:44,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983202324] [2021-06-05 13:53:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983202324] [2021-06-05 13:53:44,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983202324] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:44,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:44,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854910061] [2021-06-05 13:53:44,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:44,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:44,695 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,811 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-06-05 13:53:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,812 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:53:44,812 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 13:53:44,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 13:53:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-06-05 13:53:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-06-05 13:53:44,817 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-06-05 13:53:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:44,817 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-06-05 13:53:44,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-06-05 13:53:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:44,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:44,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:44,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 13:53:44,819 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169953, now seen corresponding path program 4 times [2021-06-05 13:53:44,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:44,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432222157] [2021-06-05 13:53:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432222157] [2021-06-05 13:53:44,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432222157] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:44,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:44,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:53:44,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39768019] [2021-06-05 13:53:44,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:53:44,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:53:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:44,878 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,938 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-06-05 13:53:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:53:44,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,939 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:53:44,939 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 13:53:44,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 13:53:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-06-05 13:53:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-05 13:53:44,942 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-06-05 13:53:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:44,942 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-05 13:53:44,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-05 13:53:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:44,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:44,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:44,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:53:44,943 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:44,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1156500989, now seen corresponding path program 5 times [2021-06-05 13:53:44,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:44,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39871536] [2021-06-05 13:53:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:44,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39871536] [2021-06-05 13:53:44,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39871536] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:44,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:44,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:53:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540504393] [2021-06-05 13:53:44,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:53:44,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:53:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:44,983 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,050 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-06-05 13:53:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:53:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,051 INFO L225 Difference]: With dead ends: 175 [2021-06-05 13:53:45,052 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 13:53:45,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 13:53:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-06-05 13:53:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 13:53:45,058 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-06-05 13:53:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,058 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 13:53:45,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 13:53:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:45,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,060 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:53:45,060 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash 774326845, now seen corresponding path program 6 times [2021-06-05 13:53:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099375415] [2021-06-05 13:53:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:45,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:45,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099375415] [2021-06-05 13:53:45,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099375415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:45,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:45,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:53:45,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730378597] [2021-06-05 13:53:45,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:53:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:53:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:45,126 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,184 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-06-05 13:53:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:53:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,185 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:53:45,185 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:53:45,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:53:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-06-05 13:53:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-06-05 13:53:45,188 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-06-05 13:53:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,189 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-06-05 13:53:45,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-06-05 13:53:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:45,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,189 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 13:53:45,190 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 498525696, now seen corresponding path program 8 times [2021-06-05 13:53:45,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748325746] [2021-06-05 13:53:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:45,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748325746] [2021-06-05 13:53:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748325746] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:45,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:45,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59408988] [2021-06-05 13:53:45,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:45,236 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,325 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-06-05 13:53:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,326 INFO L225 Difference]: With dead ends: 129 [2021-06-05 13:53:45,326 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:53:45,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:53:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-06-05 13:53:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-06-05 13:53:45,328 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-06-05 13:53:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,329 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-06-05 13:53:45,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-06-05 13:53:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:45,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 13:53:45,329 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 9 times [2021-06-05 13:53:45,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250496694] [2021-06-05 13:53:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:45,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:45,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250496694] [2021-06-05 13:53:45,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250496694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:45,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:45,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:45,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623701041] [2021-06-05 13:53:45,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:45,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:45,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:45,375 INFO L87 Difference]: Start difference. First operand 99 states and 206 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,467 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-06-05 13:53:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,469 INFO L225 Difference]: With dead ends: 144 [2021-06-05 13:53:45,469 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 13:53:45,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 13:53:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-06-05 13:53:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-06-05 13:53:45,474 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-06-05 13:53:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,474 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-06-05 13:53:45,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-06-05 13:53:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:45,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 13:53:45,475 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944802, now seen corresponding path program 10 times [2021-06-05 13:53:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538528585] [2021-06-05 13:53:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:45,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538528585] [2021-06-05 13:53:45,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538528585] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:45,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:45,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189936404] [2021-06-05 13:53:45,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:45,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:45,536 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,622 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-06-05 13:53:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,624 INFO L225 Difference]: With dead ends: 127 [2021-06-05 13:53:45,624 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 13:53:45,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 13:53:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-06-05 13:53:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-06-05 13:53:45,627 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-06-05 13:53:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,627 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-06-05 13:53:45,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-06-05 13:53:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:45,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 13:53:45,628 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,634 INFO L82 PathProgramCache]: Analyzing trace with hash 579579668, now seen corresponding path program 1 times [2021-06-05 13:53:45,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454062195] [2021-06-05 13:53:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:45,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454062195] [2021-06-05 13:53:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454062195] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:45,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:45,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616304273] [2021-06-05 13:53:45,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:45,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:45,693 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,776 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-06-05 13:53:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,777 INFO L225 Difference]: With dead ends: 129 [2021-06-05 13:53:45,777 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 13:53:45,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 13:53:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-06-05 13:53:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-06-05 13:53:45,780 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-06-05 13:53:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,781 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-06-05 13:53:45,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-06-05 13:53:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:45,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 13:53:45,781 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444461, now seen corresponding path program 1 times [2021-06-05 13:53:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399721880] [2021-06-05 13:53:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:45,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399721880] [2021-06-05 13:53:45,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399721880] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:45,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:45,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:45,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977405572] [2021-06-05 13:53:45,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:45,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:45,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:45,858 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,020 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-06-05 13:53:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:53:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,021 INFO L225 Difference]: With dead ends: 147 [2021-06-05 13:53:46,021 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 13:53:46,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 13:53:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-06-05 13:53:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-06-05 13:53:46,025 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-06-05 13:53:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,025 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-06-05 13:53:46,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-06-05 13:53:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:46,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:46,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:46,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 13:53:46,026 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1727789867, now seen corresponding path program 2 times [2021-06-05 13:53:46,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667244416] [2021-06-05 13:53:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:46,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667244416] [2021-06-05 13:53:46,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667244416] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:46,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:46,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:46,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520884491] [2021-06-05 13:53:46,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:46,085 INFO L87 Difference]: Start difference. First operand 88 states and 181 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,214 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-06-05 13:53:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,215 INFO L225 Difference]: With dead ends: 175 [2021-06-05 13:53:46,216 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 13:53:46,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 13:53:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-06-05 13:53:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-06-05 13:53:46,219 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-06-05 13:53:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,220 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-06-05 13:53:46,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-06-05 13:53:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:46,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:46,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:46,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 13:53:46,221 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash 563474972, now seen corresponding path program 2 times [2021-06-05 13:53:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094604980] [2021-06-05 13:53:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:46,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094604980] [2021-06-05 13:53:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094604980] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:46,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434344705] [2021-06-05 13:53:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:46,272 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,360 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-06-05 13:53:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,361 INFO L225 Difference]: With dead ends: 172 [2021-06-05 13:53:46,361 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 13:53:46,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 13:53:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-06-05 13:53:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-06-05 13:53:46,365 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-06-05 13:53:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,365 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-06-05 13:53:46,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-06-05 13:53:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:46,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:46,365 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:46,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 13:53:46,365 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1456838970, now seen corresponding path program 3 times [2021-06-05 13:53:46,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3805075] [2021-06-05 13:53:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:46,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3805075] [2021-06-05 13:53:46,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3805075] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:46,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:46,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:46,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191985147] [2021-06-05 13:53:46,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:46,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:46,413 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,496 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-06-05 13:53:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,497 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:53:46,497 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 13:53:46,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 13:53:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-06-05 13:53:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.074766355140187) internal successors, (222), 107 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-06-05 13:53:46,501 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-06-05 13:53:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,501 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-06-05 13:53:46,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-06-05 13:53:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:46,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:46,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:46,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 13:53:46,501 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1057522941, now seen corresponding path program 3 times [2021-06-05 13:53:46,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744193398] [2021-06-05 13:53:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:46,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744193398] [2021-06-05 13:53:46,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744193398] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:46,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:46,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:46,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671635590] [2021-06-05 13:53:46,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:46,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:46,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:46,558 INFO L87 Difference]: Start difference. First operand 108 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,699 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-06-05 13:53:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:53:46,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,701 INFO L225 Difference]: With dead ends: 166 [2021-06-05 13:53:46,701 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 13:53:46,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 13:53:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-06-05 13:53:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 13:53:46,705 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-06-05 13:53:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,705 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 13:53:46,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 13:53:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:46,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:46,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:46,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 13:53:46,706 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1950886939, now seen corresponding path program 4 times [2021-06-05 13:53:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653309109] [2021-06-05 13:53:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:46,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653309109] [2021-06-05 13:53:46,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653309109] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:46,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:46,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:46,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144710104] [2021-06-05 13:53:46,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:46,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:46,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:46,763 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:46,930 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-06-05 13:53:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:53:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:46,931 INFO L225 Difference]: With dead ends: 157 [2021-06-05 13:53:46,931 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:53:46,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:53:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-06-05 13:53:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-06-05 13:53:46,934 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-06-05 13:53:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,934 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-06-05 13:53:46,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-06-05 13:53:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:46,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:46,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:46,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 13:53:46,935 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash 460332689, now seen corresponding path program 5 times [2021-06-05 13:53:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:46,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565712889] [2021-06-05 13:53:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:46,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565712889] [2021-06-05 13:53:46,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565712889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:46,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:46,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:46,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140035165] [2021-06-05 13:53:46,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:46,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:46,993 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,117 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-06-05 13:53:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:47,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,118 INFO L225 Difference]: With dead ends: 189 [2021-06-05 13:53:47,118 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:53:47,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:53:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-06-05 13:53:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-06-05 13:53:47,121 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-06-05 13:53:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,121 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-06-05 13:53:47,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-06-05 13:53:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:47,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 13:53:47,122 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash -209934237, now seen corresponding path program 6 times [2021-06-05 13:53:47,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310902665] [2021-06-05 13:53:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310902665] [2021-06-05 13:53:47,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310902665] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:47,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:47,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:47,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139657399] [2021-06-05 13:53:47,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:47,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:47,175 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,303 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-06-05 13:53:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,304 INFO L225 Difference]: With dead ends: 195 [2021-06-05 13:53:47,304 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 13:53:47,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 13:53:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-06-05 13:53:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-06-05 13:53:47,308 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-06-05 13:53:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,308 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-06-05 13:53:47,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-06-05 13:53:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:47,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 13:53:47,309 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 683429761, now seen corresponding path program 7 times [2021-06-05 13:53:47,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955358755] [2021-06-05 13:53:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955358755] [2021-06-05 13:53:47,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955358755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:47,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:47,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:47,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904921531] [2021-06-05 13:53:47,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:47,361 INFO L87 Difference]: Start difference. First operand 131 states and 278 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,477 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-06-05 13:53:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,478 INFO L225 Difference]: With dead ends: 180 [2021-06-05 13:53:47,478 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 13:53:47,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 13:53:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-06-05 13:53:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-06-05 13:53:47,482 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-06-05 13:53:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,482 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-06-05 13:53:47,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-06-05 13:53:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:47,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 13:53:47,483 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649044, now seen corresponding path program 4 times [2021-06-05 13:53:47,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383763820] [2021-06-05 13:53:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383763820] [2021-06-05 13:53:47,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383763820] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:47,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:47,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:47,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499842852] [2021-06-05 13:53:47,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:47,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:47,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:47,540 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,624 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-06-05 13:53:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:47,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,625 INFO L225 Difference]: With dead ends: 182 [2021-06-05 13:53:47,625 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 13:53:47,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 13:53:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-06-05 13:53:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-06-05 13:53:47,628 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-06-05 13:53:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,629 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-06-05 13:53:47,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-06-05 13:53:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:47,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,629 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 13:53:47,629 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120054, now seen corresponding path program 5 times [2021-06-05 13:53:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688793056] [2021-06-05 13:53:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688793056] [2021-06-05 13:53:47,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688793056] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:47,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:47,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:47,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773546306] [2021-06-05 13:53:47,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:47,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:47,671 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,755 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-06-05 13:53:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,756 INFO L225 Difference]: With dead ends: 182 [2021-06-05 13:53:47,756 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 13:53:47,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 13:53:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-06-05 13:53:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-06-05 13:53:47,759 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-06-05 13:53:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,760 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-06-05 13:53:47,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-06-05 13:53:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:47,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,760 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 13:53:47,760 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483244, now seen corresponding path program 6 times [2021-06-05 13:53:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547614628] [2021-06-05 13:53:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547614628] [2021-06-05 13:53:47,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547614628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:47,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:47,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:47,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381035858] [2021-06-05 13:53:47,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:47,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:47,802 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,897 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-06-05 13:53:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,899 INFO L225 Difference]: With dead ends: 171 [2021-06-05 13:53:47,899 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 13:53:47,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 13:53:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-06-05 13:53:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-06-05 13:53:47,902 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-06-05 13:53:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:47,902 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-06-05 13:53:47,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-06-05 13:53:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:47,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 13:53:47,903 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash -493733101, now seen corresponding path program 8 times [2021-06-05 13:53:47,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124806061] [2021-06-05 13:53:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124806061] [2021-06-05 13:53:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124806061] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:47,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:47,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:47,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122933750] [2021-06-05 13:53:47,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:47,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:47,952 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:48,090 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-06-05 13:53:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:53:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:48,091 INFO L225 Difference]: With dead ends: 166 [2021-06-05 13:53:48,091 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:53:48,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:53:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-05 13:53:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-06-05 13:53:48,096 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-06-05 13:53:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,096 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-06-05 13:53:48,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-06-05 13:53:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:48,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,096 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 13:53:48,097 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash -169262091, now seen corresponding path program 9 times [2021-06-05 13:53:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454248732] [2021-06-05 13:53:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:48,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454248732] [2021-06-05 13:53:48,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454248732] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:48,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:48,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:48,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783299017] [2021-06-05 13:53:48,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:48,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:48,151 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:48,318 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-06-05 13:53:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:53:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:48,319 INFO L225 Difference]: With dead ends: 166 [2021-06-05 13:53:48,319 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 13:53:48,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 13:53:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-06-05 13:53:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-06-05 13:53:48,322 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-06-05 13:53:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,322 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-06-05 13:53:48,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-06-05 13:53:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:48,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,323 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 13:53:48,323 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash 724101907, now seen corresponding path program 10 times [2021-06-05 13:53:48,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313744565] [2021-06-05 13:53:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:48,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313744565] [2021-06-05 13:53:48,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313744565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:48,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:48,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:48,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749245992] [2021-06-05 13:53:48,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:48,391 INFO L87 Difference]: Start difference. First operand 107 states and 213 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:48,554 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-06-05 13:53:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:53:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:48,555 INFO L225 Difference]: With dead ends: 155 [2021-06-05 13:53:48,555 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 13:53:48,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 13:53:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-06-05 13:53:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-06-05 13:53:48,558 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-06-05 13:53:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,558 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-06-05 13:53:48,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-06-05 13:53:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:48,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 13:53:48,559 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,559 INFO L82 PathProgramCache]: Analyzing trace with hash 283747689, now seen corresponding path program 11 times [2021-06-05 13:53:48,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188875673] [2021-06-05 13:53:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:48,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188875673] [2021-06-05 13:53:48,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188875673] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:48,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:48,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:48,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173853442] [2021-06-05 13:53:48,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:48,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:48,613 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:48,720 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-06-05 13:53:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:48,720 INFO L225 Difference]: With dead ends: 110 [2021-06-05 13:53:48,720 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 13:53:48,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 13:53:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-06-05 13:53:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-06-05 13:53:48,722 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-06-05 13:53:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,723 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-06-05 13:53:48,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-06-05 13:53:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:48,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,723 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 13:53:48,723 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -386519237, now seen corresponding path program 12 times [2021-06-05 13:53:48,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866622545] [2021-06-05 13:53:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:48,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866622545] [2021-06-05 13:53:48,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866622545] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:48,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:48,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:48,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538881787] [2021-06-05 13:53:48,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:48,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:48,799 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:48,928 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-06-05 13:53:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:48,929 INFO L225 Difference]: With dead ends: 116 [2021-06-05 13:53:48,929 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 13:53:48,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 13:53:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-06-05 13:53:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 13:53:48,931 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 13:53:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,932 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 13:53:48,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 13:53:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:48,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 13:53:48,932 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash 506844761, now seen corresponding path program 13 times [2021-06-05 13:53:48,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153880497] [2021-06-05 13:53:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:48,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153880497] [2021-06-05 13:53:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153880497] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:48,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:48,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:48,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638717132] [2021-06-05 13:53:48,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:48,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:48,988 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,100 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 13:53:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,101 INFO L225 Difference]: With dead ends: 101 [2021-06-05 13:53:49,101 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 13:53:49,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 13:53:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-06-05 13:53:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-06-05 13:53:49,103 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-06-05 13:53:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,104 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-06-05 13:53:49,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-06-05 13:53:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,104 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 13:53:49,104 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash -670318101, now seen corresponding path program 14 times [2021-06-05 13:53:49,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383944719] [2021-06-05 13:53:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383944719] [2021-06-05 13:53:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383944719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:49,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:49,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320632483] [2021-06-05 13:53:49,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:49,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:49,161 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,277 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-06-05 13:53:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,277 INFO L225 Difference]: With dead ends: 112 [2021-06-05 13:53:49,278 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 13:53:49,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 13:53:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-06-05 13:53:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-06-05 13:53:49,279 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-06-05 13:53:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,280 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-06-05 13:53:49,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-06-05 13:53:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 13:53:49,280 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 15 times [2021-06-05 13:53:49,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12311380] [2021-06-05 13:53:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12311380] [2021-06-05 13:53:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12311380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:49,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:49,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:49,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884418263] [2021-06-05 13:53:49,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:49,341 INFO L87 Difference]: Start difference. First operand 68 states and 124 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,452 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-06-05 13:53:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,453 INFO L225 Difference]: With dead ends: 100 [2021-06-05 13:53:49,453 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 13:53:49,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 13:53:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-06-05 13:53:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.838235294117647) internal successors, (125), 68 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-06-05 13:53:49,455 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-06-05 13:53:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,455 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-06-05 13:53:49,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-06-05 13:53:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 13:53:49,456 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,456 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 16 times [2021-06-05 13:53:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276946691] [2021-06-05 13:53:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276946691] [2021-06-05 13:53:49,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276946691] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:49,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:49,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:49,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482627070] [2021-06-05 13:53:49,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:49,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:49,507 INFO L87 Difference]: Start difference. First operand 69 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,604 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-06-05 13:53:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:49,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,604 INFO L225 Difference]: With dead ends: 89 [2021-06-05 13:53:49,605 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 13:53:49,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 13:53:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-06-05 13:53:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-06-05 13:53:49,606 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-06-05 13:53:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,606 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-06-05 13:53:49,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-06-05 13:53:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 13:53:49,607 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620800, now seen corresponding path program 7 times [2021-06-05 13:53:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879955091] [2021-06-05 13:53:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879955091] [2021-06-05 13:53:49,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879955091] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:49,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:49,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:49,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171042200] [2021-06-05 13:53:49,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:49,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:49,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:49,655 INFO L87 Difference]: Start difference. First operand 46 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,742 INFO L93 Difference]: Finished difference Result 109 states and 168 transitions. [2021-06-05 13:53:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,743 INFO L225 Difference]: With dead ends: 109 [2021-06-05 13:53:49,743 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 13:53:49,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 13:53:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-06-05 13:53:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.64) internal successors, (82), 50 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 82 transitions. [2021-06-05 13:53:49,745 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 82 transitions. Word has length 18 [2021-06-05 13:53:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,746 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 82 transitions. [2021-06-05 13:53:49,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 82 transitions. [2021-06-05 13:53:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 13:53:49,746 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454498, now seen corresponding path program 8 times [2021-06-05 13:53:49,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009853366] [2021-06-05 13:53:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009853366] [2021-06-05 13:53:49,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009853366] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:49,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:49,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102855343] [2021-06-05 13:53:49,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:49,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:49,791 INFO L87 Difference]: Start difference. First operand 51 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,860 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-06-05 13:53:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,864 INFO L225 Difference]: With dead ends: 103 [2021-06-05 13:53:49,864 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 13:53:49,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 13:53:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2021-06-05 13:53:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 83 transitions. [2021-06-05 13:53:49,866 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 83 transitions. Word has length 18 [2021-06-05 13:53:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,866 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 83 transitions. [2021-06-05 13:53:49,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2021-06-05 13:53:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 13:53:49,866 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148800, now seen corresponding path program 9 times [2021-06-05 13:53:49,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532087571] [2021-06-05 13:53:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532087571] [2021-06-05 13:53:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532087571] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:49,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:49,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:49,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242644746] [2021-06-05 13:53:49,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:49,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:49,919 INFO L87 Difference]: Start difference. First operand 52 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,992 INFO L93 Difference]: Finished difference Result 92 states and 139 transitions. [2021-06-05 13:53:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,993 INFO L225 Difference]: With dead ends: 92 [2021-06-05 13:53:49,993 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 13:53:49,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 13:53:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-06-05 13:53:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-06-05 13:53:49,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 18 [2021-06-05 13:53:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:49,995 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-06-05 13:53:49,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-06-05 13:53:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:49,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:49,995 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:49,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 13:53:49,995 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572320, now seen corresponding path program 10 times [2021-06-05 13:53:49,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:49,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464012618] [2021-06-05 13:53:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:50,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464012618] [2021-06-05 13:53:50,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464012618] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:50,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:50,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 13:53:50,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228684972] [2021-06-05 13:53:50,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:50,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:50,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:50,037 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,097 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2021-06-05 13:53:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:53:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,098 INFO L225 Difference]: With dead ends: 63 [2021-06-05 13:53:50,098 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 13:53:50,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 13:53:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-05 13:53:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-06-05 13:53:50,099 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-06-05 13:53:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:50,099 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-06-05 13:53:50,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-06-05 13:53:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:50,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:50,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:50,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 13:53:50,100 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 17 times [2021-06-05 13:53:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:50,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770660809] [2021-06-05 13:53:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:50,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770660809] [2021-06-05 13:53:50,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770660809] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:50,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:50,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:50,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922395356] [2021-06-05 13:53:50,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:50,157 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,249 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-06-05 13:53:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,249 INFO L225 Difference]: With dead ends: 71 [2021-06-05 13:53:50,249 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 13:53:50,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 13:53:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-06-05 13:53:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-06-05 13:53:50,251 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 18 [2021-06-05 13:53:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:50,251 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-06-05 13:53:50,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-06-05 13:53:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:50,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:50,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:50,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-05 13:53:50,251 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 18 times [2021-06-05 13:53:50,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:50,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930158982] [2021-06-05 13:53:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:50,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:50,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930158982] [2021-06-05 13:53:50,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930158982] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:50,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:50,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195412198] [2021-06-05 13:53:50,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:50,304 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,386 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-06-05 13:53:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,387 INFO L225 Difference]: With dead ends: 63 [2021-06-05 13:53:50,387 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 13:53:50,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 13:53:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-06-05 13:53:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2021-06-05 13:53:50,388 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2021-06-05 13:53:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:50,388 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2021-06-05 13:53:50,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2021-06-05 13:53:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:50,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:50,389 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:50,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 13:53:50,389 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 19 times [2021-06-05 13:53:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:50,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211688970] [2021-06-05 13:53:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:50,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:50,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211688970] [2021-06-05 13:53:50,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211688970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:50,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:50,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:50,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542986829] [2021-06-05 13:53:50,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:50,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:50,447 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,534 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-06-05 13:53:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,535 INFO L225 Difference]: With dead ends: 52 [2021-06-05 13:53:50,535 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 13:53:50,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 13:53:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-06-05 13:53:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-06-05 13:53:50,536 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 18 [2021-06-05 13:53:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:50,536 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-06-05 13:53:50,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-06-05 13:53:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:53:50,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:50,537 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:50,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-05 13:53:50,537 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash -974982143, now seen corresponding path program 20 times [2021-06-05 13:53:50,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:50,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633784242] [2021-06-05 13:53:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:50,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:50,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633784242] [2021-06-05 13:53:50,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633784242] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:50,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:50,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:53:50,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663055390] [2021-06-05 13:53:50,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:50,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:50,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:50,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:50,593 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,669 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-06-05 13:53:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:53:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,670 INFO L225 Difference]: With dead ends: 33 [2021-06-05 13:53:50,670 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:53:50,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:53:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:53:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:53:50,670 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) [2021-06-05 13:53:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:53:50,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-06-05 13:53:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:50,671 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:53:50,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:53:50,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:53:50,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-05 13:53:50,672 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:53:50,675 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:53:50 BasicIcfg [2021-06-05 13:53:50,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:53:50,675 INFO L168 Benchmark]: Toolchain (without parser) took 8777.71 ms. Allocated memory was 356.5 MB in the beginning and 444.6 MB in the end (delta: 88.1 MB). Free memory was 335.4 MB in the beginning and 208.1 MB in the end (delta: 127.3 MB). Peak memory consumption was 219.0 MB. Max. memory is 16.0 GB. [2021-06-05 13:53:50,675 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 336.6 MB in the beginning and 336.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:53:50,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.23 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 334.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:53:50,675 INFO L168 Benchmark]: Boogie Preprocessor took 14.47 ms. Allocated memory is still 356.5 MB. Free memory was 334.0 MB in the beginning and 333.1 MB in the end (delta: 855.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 13:53:50,675 INFO L168 Benchmark]: RCFGBuilder took 207.64 ms. Allocated memory is still 356.5 MB. Free memory was 333.0 MB in the beginning and 322.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 13:53:50,676 INFO L168 Benchmark]: TraceAbstraction took 8523.60 ms. Allocated memory was 356.5 MB in the beginning and 444.6 MB in the end (delta: 88.1 MB). Free memory was 322.3 MB in the beginning and 208.1 MB in the end (delta: 114.2 MB). Peak memory consumption was 204.3 MB. Max. memory is 16.0 GB. [2021-06-05 13:53:50,676 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 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 336.6 MB in the beginning and 336.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.23 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 334.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.47 ms. Allocated memory is still 356.5 MB. Free memory was 334.0 MB in the beginning and 333.1 MB in the end (delta: 855.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 207.64 ms. Allocated memory is still 356.5 MB. Free memory was 333.0 MB in the beginning and 322.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 8523.60 ms. Allocated memory was 356.5 MB in the beginning and 444.6 MB in the end (delta: 88.1 MB). Free memory was 322.3 MB in the beginning and 208.1 MB in the end (delta: 114.2 MB). Peak memory consumption was 204.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: 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 5 procedures, 43 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8448.4ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 60.5ms, AutomataDifference: 5064.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2185 SDtfs, 3030 SDslu, 6767 SDs, 0 SdLazy, 2178 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1251.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 560 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4678.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 357, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 206.3ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1682 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.0ms SsaConstructionTime, 128.6ms SatisfiabilityAnalysisTime, 2541.2ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5484 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...