/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/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:22:29,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:22:29,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:22:30,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-22 02:22:30,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-22 02:22:30,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-22 02:22:30,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-22 02:22:30,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-22 02:22:30,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-22 02:22:30,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-22 02:22:30,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-22 02:22:30,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-22 02:22:30,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-22 02:22:30,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-22 02:22:30,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-22 02:22:30,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-22 02:22:30,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-22 02:22:30,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-22 02:22:30,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-22 02:22:30,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-22 02:22:30,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-22 02:22:30,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-22 02:22:30,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-22 02:22:30,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-22 02:22:30,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-22 02:22:30,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-22 02:22:30,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-22 02:22:30,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-22 02:22:30,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-22 02:22:30,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-22 02:22:30,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-22 02:22:30,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-22 02:22:30,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-22 02:22:30,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-22 02:22:30,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-22 02:22:30,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-22 02:22:30,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-22 02:22:30,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-22 02:22:30,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:22:30,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:22:30,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:22:30,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:22:30,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:22:30,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:22:30,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:22:30,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:22:30,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:22:30,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:22:30,126 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:22:30,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:22:30,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:22:30,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:22:30,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:22:30,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:22:30,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:22:30,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:22:30,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:22:30,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:22:30,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:22:30,421 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:22:30,422 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:22:30,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-05-22 02:22:30,423 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-05-22 02:22:30,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:22:30,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:22:30,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:30,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:22:30,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:22:30,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:30,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:22:30,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:22:30,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:22:30,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... [2021-05-22 02:22:30,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:22:30,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:22:30,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:22:30,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:22:30,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:22:30,580 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:22:30,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:22:30,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:22:30,581 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:22:30,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:22:30,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:22:30,581 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:22:30,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:22:30,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:22:30,582 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:22:31,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:22:31,181 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-22 02:22:31,184 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:31 BoogieIcfgContainer [2021-05-22 02:22:31,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:22:31,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:22:31,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:22:31,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:22:31,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:30" (1/2) ... [2021-05-22 02:22:31,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519668da and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:22:31, skipping insertion in model container [2021-05-22 02:22:31,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:31" (2/2) ... [2021-05-22 02:22:31,195 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-05-22 02:22:31,199 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:22:31,200 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:22:31,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:22:31,203 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:22:31,244 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:22:31,265 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:22:31,293 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:22:31,293 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:22:31,293 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:22:31,293 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:22:31,293 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:22:31,293 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:22:31,293 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:22:31,294 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:22:31,301 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-05-22 02:22:31,314 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 02:22:31,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:31,323 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:31,323 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-05-22 02:22:31,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:31,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503078759] [2021-05-22 02:22:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:32,131 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-05-22 02:22:32,690 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-05-22 02:22:33,184 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-05-22 02:22:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:33,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:33,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503078759] [2021-05-22 02:22:33,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503078759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:33,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:33,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:33,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053333681] [2021-05-22 02:22:33,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:33,292 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,551 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-22 02:22:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:33,592 INFO L93 Difference]: Finished difference Result 66 states and 158 transitions. [2021-05-22 02:22:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-22 02:22:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:33,604 INFO L225 Difference]: With dead ends: 66 [2021-05-22 02:22:33,604 INFO L226 Difference]: Without dead ends: 59 [2021-05-22 02:22:33,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 772.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-22 02:22:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-05-22 02:22:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-05-22 02:22:33,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-05-22 02:22:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:33,672 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-05-22 02:22:33,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-05-22 02:22:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 02:22:33,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:33,673 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:33,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:22:33,673 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:33,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-05-22 02:22:33,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:33,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500864339] [2021-05-22 02:22:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,105 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-05-22 02:22:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500864339] [2021-05-22 02:22:34,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500864339] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:34,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449762286] [2021-05-22 02:22:34,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:34,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:34,181 INFO L87 Difference]: Start difference. First operand 44 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,370 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-22 02:22:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,391 INFO L93 Difference]: Finished difference Result 66 states and 156 transitions. [2021-05-22 02:22:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-22 02:22:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,392 INFO L225 Difference]: With dead ends: 66 [2021-05-22 02:22:34,393 INFO L226 Difference]: Without dead ends: 59 [2021-05-22 02:22:34,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-22 02:22:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-05-22 02:22:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-05-22 02:22:34,400 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-05-22 02:22:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,401 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-05-22 02:22:34,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-05-22 02:22:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 02:22:34,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,402 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:22:34,402 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1880928136, now seen corresponding path program 1 times [2021-05-22 02:22:34,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993913671] [2021-05-22 02:22:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993913671] [2021-05-22 02:22:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993913671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978033784] [2021-05-22 02:22:34,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,419 INFO L87 Difference]: Start difference. First operand 46 states and 126 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,427 INFO L93 Difference]: Finished difference Result 52 states and 141 transitions. [2021-05-22 02:22:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 02:22:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,428 INFO L225 Difference]: With dead ends: 52 [2021-05-22 02:22:34,429 INFO L226 Difference]: Without dead ends: 52 [2021-05-22 02:22:34,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-22 02:22:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-22 02:22:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-05-22 02:22:34,436 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-05-22 02:22:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,436 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-05-22 02:22:34,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-05-22 02:22:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 02:22:34,437 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:22:34,438 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-05-22 02:22:34,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130332432] [2021-05-22 02:22:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130332432] [2021-05-22 02:22:34,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130332432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929289181] [2021-05-22 02:22:34,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,454 INFO L87 Difference]: Start difference. First operand 52 states and 141 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,460 INFO L93 Difference]: Finished difference Result 58 states and 156 transitions. [2021-05-22 02:22:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 02:22:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,461 INFO L225 Difference]: With dead ends: 58 [2021-05-22 02:22:34,461 INFO L226 Difference]: Without dead ends: 58 [2021-05-22 02:22:34,461 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 [2021-05-22 02:22:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-22 02:22:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-22 02:22:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 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) [2021-05-22 02:22:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-05-22 02:22:34,467 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-05-22 02:22:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,467 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-05-22 02:22:34,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-05-22 02:22:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 02:22:34,468 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,468 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:22:34,469 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-05-22 02:22:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943029442] [2021-05-22 02:22:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943029442] [2021-05-22 02:22:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943029442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872701403] [2021-05-22 02:22:34,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,485 INFO L87 Difference]: Start difference. First operand 58 states and 156 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,490 INFO L93 Difference]: Finished difference Result 66 states and 175 transitions. [2021-05-22 02:22:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 02:22:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,491 INFO L225 Difference]: With dead ends: 66 [2021-05-22 02:22:34,492 INFO L226 Difference]: Without dead ends: 66 [2021-05-22 02:22:34,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-22 02:22:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-22 02:22:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6923076923076925) internal successors, (175), 65 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-05-22 02:22:34,497 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-05-22 02:22:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,497 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-05-22 02:22:34,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-05-22 02:22:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 02:22:34,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:22:34,498 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-05-22 02:22:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973652384] [2021-05-22 02:22:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973652384] [2021-05-22 02:22:34,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973652384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991638338] [2021-05-22 02:22:34,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,516 INFO L87 Difference]: Start difference. First operand 66 states and 175 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,521 INFO L93 Difference]: Finished difference Result 74 states and 194 transitions. [2021-05-22 02:22:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 02:22:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,522 INFO L225 Difference]: With dead ends: 74 [2021-05-22 02:22:34,522 INFO L226 Difference]: Without dead ends: 74 [2021-05-22 02:22:34,523 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 [2021-05-22 02:22:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-22 02:22:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-22 02:22:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.6575342465753424) internal successors, (194), 73 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-05-22 02:22:34,528 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-05-22 02:22:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,529 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-05-22 02:22:34,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-05-22 02:22:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:22:34,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:22:34,530 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-05-22 02:22:34,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099545476] [2021-05-22 02:22:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:34,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099545476] [2021-05-22 02:22:34,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099545476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112390581] [2021-05-22 02:22:34,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,552 INFO L87 Difference]: Start difference. First operand 74 states and 194 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,568 INFO L93 Difference]: Finished difference Result 100 states and 228 transitions. [2021-05-22 02:22:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:22:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,570 INFO L225 Difference]: With dead ends: 100 [2021-05-22 02:22:34,570 INFO L226 Difference]: Without dead ends: 100 [2021-05-22 02:22:34,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-22 02:22:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-05-22 02:22:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-05-22 02:22:34,576 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-05-22 02:22:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,576 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-05-22 02:22:34,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-05-22 02:22:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:22:34,577 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,577 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:22:34,577 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-05-22 02:22:34,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190557014] [2021-05-22 02:22:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:34,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190557014] [2021-05-22 02:22:34,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190557014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661331421] [2021-05-22 02:22:34,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,629 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,652 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-05-22 02:22:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:22:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,653 INFO L225 Difference]: With dead ends: 82 [2021-05-22 02:22:34,653 INFO L226 Difference]: Without dead ends: 82 [2021-05-22 02:22:34,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-22 02:22:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-05-22 02:22:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-05-22 02:22:34,658 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-05-22 02:22:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,658 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-05-22 02:22:34,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-05-22 02:22:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:22:34,659 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:22:34,659 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-05-22 02:22:34,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777638808] [2021-05-22 02:22:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:34,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777638808] [2021-05-22 02:22:34,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777638808] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667092630] [2021-05-22 02:22:34,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,685 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,697 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2021-05-22 02:22:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:22:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,698 INFO L225 Difference]: With dead ends: 82 [2021-05-22 02:22:34,699 INFO L226 Difference]: Without dead ends: 82 [2021-05-22 02:22:34,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-22 02:22:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-05-22 02:22:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-05-22 02:22:34,702 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-05-22 02:22:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,702 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-05-22 02:22:34,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-05-22 02:22:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:22:34,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:22:34,703 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-05-22 02:22:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919676083] [2021-05-22 02:22:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:34,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919676083] [2021-05-22 02:22:34,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919676083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:34,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492901263] [2021-05-22 02:22:34,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:34,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:34,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,738 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:34,758 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-05-22 02:22:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:22:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:34,759 INFO L225 Difference]: With dead ends: 82 [2021-05-22 02:22:34,759 INFO L226 Difference]: Without dead ends: 75 [2021-05-22 02:22:34,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-22 02:22:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-05-22 02:22:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-05-22 02:22:34,774 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-05-22 02:22:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:34,774 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-05-22 02:22:34,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-05-22 02:22:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:34,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:34,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:34,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:22:34,775 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-05-22 02:22:34,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:34,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449335794] [2021-05-22 02:22:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:35,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449335794] [2021-05-22 02:22:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449335794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438561349] [2021-05-22 02:22:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:22:35,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:35,428 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-22 02:22:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:35,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438561349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:35,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:35,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:22:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501719226] [2021-05-22 02:22:35,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:22:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:22:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:22:35,761 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:35,918 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-22 02:22:36,151 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-05-22 02:22:36,363 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-05-22 02:22:36,596 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-05-22 02:22:36,855 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-22 02:22:37,120 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-05-22 02:22:37,290 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-05-22 02:22:37,522 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-05-22 02:22:37,723 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-22 02:22:37,876 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-22 02:22:38,077 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-05-22 02:22:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:38,132 INFO L93 Difference]: Finished difference Result 133 states and 272 transitions. [2021-05-22 02:22:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:22:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:38,133 INFO L225 Difference]: With dead ends: 133 [2021-05-22 02:22:38,133 INFO L226 Difference]: Without dead ends: 119 [2021-05-22 02:22:38,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2619.6ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:22:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-22 02:22:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-05-22 02:22:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-05-22 02:22:38,137 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-05-22 02:22:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:38,138 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-05-22 02:22:38,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-05-22 02:22:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:38,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:38,138 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:38,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-22 02:22:38,353 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-05-22 02:22:38,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:38,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717364430] [2021-05-22 02:22:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:38,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:38,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717364430] [2021-05-22 02:22:38,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717364430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:38,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841274819] [2021-05-22 02:22:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:38,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:22:38,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841274819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:39,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:39,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:22:39,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498761309] [2021-05-22 02:22:39,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:22:39,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:22:39,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:22:39,126 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,336 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-05-22 02:22:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,556 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-05-22 02:22:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,563 INFO L225 Difference]: With dead ends: 105 [2021-05-22 02:22:39,563 INFO L226 Difference]: Without dead ends: 98 [2021-05-22 02:22:39,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:22:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-22 02:22:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-05-22 02:22:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-05-22 02:22:39,574 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-05-22 02:22:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,574 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-05-22 02:22:39,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-05-22 02:22:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:39,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:22:39,775 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-05-22 02:22:39,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135150477] [2021-05-22 02:22:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:40,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135150477] [2021-05-22 02:22:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135150477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429095354] [2021-05-22 02:22:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:40,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:22:40,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:40,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:22:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:40,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429095354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:40,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:40,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:22:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101931213] [2021-05-22 02:22:40,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:22:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:40,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:22:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:22:40,370 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,592 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-05-22 02:22:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:40,750 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-05-22 02:22:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:40,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:40,751 INFO L225 Difference]: With dead ends: 108 [2021-05-22 02:22:40,751 INFO L226 Difference]: Without dead ends: 101 [2021-05-22 02:22:40,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:22:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-22 02:22:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-05-22 02:22:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-05-22 02:22:40,754 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-05-22 02:22:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:40,754 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-05-22 02:22:40,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-05-22 02:22:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:40,755 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:40,755 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:40,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-22 02:22:40,977 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-05-22 02:22:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:40,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167644356] [2021-05-22 02:22:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:41,187 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-22 02:22:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167644356] [2021-05-22 02:22:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167644356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510715096] [2021-05-22 02:22:41,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:41,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:41,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:22:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:41,493 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-22 02:22:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510715096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:41,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:41,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:22:41,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684067066] [2021-05-22 02:22:41,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:22:41,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:22:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:22:41,656 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,777 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-22 02:22:42,064 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-22 02:22:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:42,201 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-05-22 02:22:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:42,202 INFO L225 Difference]: With dead ends: 120 [2021-05-22 02:22:42,202 INFO L226 Difference]: Without dead ends: 113 [2021-05-22 02:22:42,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 887.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-22 02:22:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-05-22 02:22:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-05-22 02:22:42,205 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-05-22 02:22:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:42,205 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-05-22 02:22:42,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-05-22 02:22:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:42,206 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:42,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:42,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:42,413 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-05-22 02:22:42,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:42,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036341990] [2021-05-22 02:22:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:42,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:42,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036341990] [2021-05-22 02:22:42,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036341990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:42,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388468815] [2021-05-22 02:22:42,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:42,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:42,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:22:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:46,482 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:22:46,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-22 02:22:46,697 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:22:46,701 INFO L168 Benchmark]: Toolchain (without parser) took 16237.44 ms. Allocated memory was 375.4 MB in the beginning and 660.6 MB in the end (delta: 285.2 MB). Free memory was 354.3 MB in the beginning and 408.8 MB in the end (delta: -54.4 MB). Peak memory consumption was 395.0 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:46,701 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 375.4 MB. Free memory was 356.4 MB in the beginning and 356.3 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:46,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.60 ms. Allocated memory is still 375.4 MB. Free memory was 354.3 MB in the beginning and 352.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:46,701 INFO L168 Benchmark]: Boogie Preprocessor took 25.51 ms. Allocated memory is still 375.4 MB. Free memory was 352.7 MB in the beginning and 351.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:46,701 INFO L168 Benchmark]: RCFGBuilder took 664.87 ms. Allocated memory is still 375.4 MB. Free memory was 351.0 MB in the beginning and 323.2 MB in the end (delta: 27.8 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:46,701 INFO L168 Benchmark]: TraceAbstraction took 15513.98 ms. Allocated memory was 375.4 MB in the beginning and 660.6 MB in the end (delta: 285.2 MB). Free memory was 323.2 MB in the beginning and 408.8 MB in the end (delta: -85.5 MB). Peak memory consumption was 362.2 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:46,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 375.4 MB. Free memory was 356.4 MB in the beginning and 356.3 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.60 ms. Allocated memory is still 375.4 MB. Free memory was 354.3 MB in the beginning and 352.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.51 ms. Allocated memory is still 375.4 MB. Free memory was 352.7 MB in the beginning and 351.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 664.87 ms. Allocated memory is still 375.4 MB. Free memory was 351.0 MB in the beginning and 323.2 MB in the end (delta: 27.8 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 15513.98 ms. Allocated memory was 375.4 MB in the beginning and 660.6 MB in the end (delta: 285.2 MB). Free memory was 323.2 MB in the beginning and 408.8 MB in the end (delta: -85.5 MB). Peak memory consumption was 362.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...