java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:42:50,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:42:50,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:42:50,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:42:50,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:42:50,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:42:50,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:42:50,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:42:50,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:42:50,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:42:50,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:42:50,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:42:50,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:42:50,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:42:50,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:42:50,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:42:50,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:42:50,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:42:50,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:42:50,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:42:50,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:42:50,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:42:50,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:42:50,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:42:50,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:42:50,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:42:50,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:42:50,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:42:50,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:42:50,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:42:50,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:42:50,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:42:50,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:42:50,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:42:50,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:42:50,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:42:50,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:42:50,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:42:50,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:42:50,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:42:50,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:42:50,349 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:42:50,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:42:50,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:42:50,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:42:50,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:42:50,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:42:50,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:42:50,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:42:50,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:42:50,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:42:50,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:42:50,354 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:42:50,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:42:50,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:42:50,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:42:50,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:42:50,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:42:50,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:42:50,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:42:50,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:42:50,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:42:50,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:42:50,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:42:50,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:42:50,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:42:50,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:42:50,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:42:50,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:42:50,671 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:42:50,671 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:42:50,672 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-3.c [2019-10-13 19:42:50,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1280aab/ab75abf28af34dd0852f804cd1d7edb0/FLAG603811273 [2019-10-13 19:42:51,335 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:42:51,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-3.c [2019-10-13 19:42:51,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1280aab/ab75abf28af34dd0852f804cd1d7edb0/FLAG603811273 [2019-10-13 19:42:51,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1280aab/ab75abf28af34dd0852f804cd1d7edb0 [2019-10-13 19:42:51,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:42:51,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:42:51,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:42:51,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:42:51,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:42:51,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:51" (1/1) ... [2019-10-13 19:42:51,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfa82b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:51, skipping insertion in model container [2019-10-13 19:42:51,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:51" (1/1) ... [2019-10-13 19:42:51,642 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:42:51,701 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:42:52,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:42:52,119 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:42:52,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:42:52,340 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:42:52,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52 WrapperNode [2019-10-13 19:42:52,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:42:52,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:42:52,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:42:52,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:42:52,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (1/1) ... [2019-10-13 19:42:52,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:42:52,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:42:52,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:42:52,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:42:52,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (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 [2019-10-13 19:42:52,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:42:52,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:42:52,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:42:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:42:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:42:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:42:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:42:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:42:53,522 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:42:53,522 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:42:53,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:53 BoogieIcfgContainer [2019-10-13 19:42:53,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:42:53,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:42:53,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:42:53,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:42:53,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:42:51" (1/3) ... [2019-10-13 19:42:53,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f44cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:53, skipping insertion in model container [2019-10-13 19:42:53,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:52" (2/3) ... [2019-10-13 19:42:53,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f44cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:53, skipping insertion in model container [2019-10-13 19:42:53,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:53" (3/3) ... [2019-10-13 19:42:53,533 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2019-10-13 19:42:53,544 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:42:53,554 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:42:53,569 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:42:53,599 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:42:53,599 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:42:53,599 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:42:53,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:42:53,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:42:53,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:42:53,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:42:53,600 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:42:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2019-10-13 19:42:53,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:42:53,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:53,630 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:53,632 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:53,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1483071650, now seen corresponding path program 1 times [2019-10-13 19:42:53,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:53,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501630080] [2019-10-13 19:42:53,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:53,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:53,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:53,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501630080] [2019-10-13 19:42:53,848 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:53,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:42:53,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130150483] [2019-10-13 19:42:53,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:42:53,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:42:53,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:42:53,873 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 3 states. [2019-10-13 19:42:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:53,952 INFO L93 Difference]: Finished difference Result 222 states and 422 transitions. [2019-10-13 19:42:53,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:42:53,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-13 19:42:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:53,966 INFO L225 Difference]: With dead ends: 222 [2019-10-13 19:42:53,966 INFO L226 Difference]: Without dead ends: 104 [2019-10-13 19:42:53,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:42:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-13 19:42:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-13 19:42:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-13 19:42:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 169 transitions. [2019-10-13 19:42:54,021 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 169 transitions. Word has length 13 [2019-10-13 19:42:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:54,022 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 169 transitions. [2019-10-13 19:42:54,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:42:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 169 transitions. [2019-10-13 19:42:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:42:54,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:54,023 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:54,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash -736931587, now seen corresponding path program 1 times [2019-10-13 19:42:54,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:54,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093635120] [2019-10-13 19:42:54,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:54,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:54,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:54,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093635120] [2019-10-13 19:42:54,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:54,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:54,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104699890] [2019-10-13 19:42:54,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:54,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:54,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:54,149 INFO L87 Difference]: Start difference. First operand 104 states and 169 transitions. Second operand 4 states. [2019-10-13 19:42:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:54,603 INFO L93 Difference]: Finished difference Result 205 states and 336 transitions. [2019-10-13 19:42:54,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:54,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 19:42:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:54,608 INFO L225 Difference]: With dead ends: 205 [2019-10-13 19:42:54,609 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 19:42:54,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 19:42:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-10-13 19:42:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 19:42:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 172 transitions. [2019-10-13 19:42:54,636 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 172 transitions. Word has length 14 [2019-10-13 19:42:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:54,637 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 172 transitions. [2019-10-13 19:42:54,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 172 transitions. [2019-10-13 19:42:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 19:42:54,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:54,640 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:54,641 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1504395429, now seen corresponding path program 1 times [2019-10-13 19:42:54,641 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:54,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412828849] [2019-10-13 19:42:54,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:54,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:54,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,293 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 41 [2019-10-13 19:42:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:55,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412828849] [2019-10-13 19:42:55,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:55,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:42:55,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761500258] [2019-10-13 19:42:55,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:42:55,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:42:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:55,326 INFO L87 Difference]: Start difference. First operand 107 states and 172 transitions. Second operand 5 states. [2019-10-13 19:42:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:56,125 INFO L93 Difference]: Finished difference Result 209 states and 338 transitions. [2019-10-13 19:42:56,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:56,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-13 19:42:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:56,131 INFO L225 Difference]: With dead ends: 209 [2019-10-13 19:42:56,134 INFO L226 Difference]: Without dead ends: 190 [2019-10-13 19:42:56,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:42:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-10-13 19:42:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2019-10-13 19:42:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-10-13 19:42:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 285 transitions. [2019-10-13 19:42:56,165 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 285 transitions. Word has length 19 [2019-10-13 19:42:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:56,166 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 285 transitions. [2019-10-13 19:42:56,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:42:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 285 transitions. [2019-10-13 19:42:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:42:56,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:56,171 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:56,171 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2142865338, now seen corresponding path program 1 times [2019-10-13 19:42:56,172 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:56,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757097414] [2019-10-13 19:42:56,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:56,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757097414] [2019-10-13 19:42:56,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:56,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:56,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704687892] [2019-10-13 19:42:56,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:56,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:56,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:56,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:56,248 INFO L87 Difference]: Start difference. First operand 176 states and 285 transitions. Second operand 4 states. [2019-10-13 19:42:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:56,543 INFO L93 Difference]: Finished difference Result 297 states and 481 transitions. [2019-10-13 19:42:56,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:56,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 19:42:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:56,545 INFO L225 Difference]: With dead ends: 297 [2019-10-13 19:42:56,545 INFO L226 Difference]: Without dead ends: 128 [2019-10-13 19:42:56,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-13 19:42:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2019-10-13 19:42:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-13 19:42:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 198 transitions. [2019-10-13 19:42:56,556 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 198 transitions. Word has length 20 [2019-10-13 19:42:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:56,557 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 198 transitions. [2019-10-13 19:42:56,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 198 transitions. [2019-10-13 19:42:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:42:56,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:56,559 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:56,559 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2011475352, now seen corresponding path program 1 times [2019-10-13 19:42:56,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:56,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71498665] [2019-10-13 19:42:56,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:42:56,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71498665] [2019-10-13 19:42:56,610 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:56,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:56,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305846330] [2019-10-13 19:42:56,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:56,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:56,612 INFO L87 Difference]: Start difference. First operand 126 states and 198 transitions. Second operand 4 states. [2019-10-13 19:42:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:56,729 INFO L93 Difference]: Finished difference Result 230 states and 362 transitions. [2019-10-13 19:42:56,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:56,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-13 19:42:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:56,731 INFO L225 Difference]: With dead ends: 230 [2019-10-13 19:42:56,731 INFO L226 Difference]: Without dead ends: 111 [2019-10-13 19:42:56,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-13 19:42:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-10-13 19:42:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 19:42:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 167 transitions. [2019-10-13 19:42:56,739 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 167 transitions. Word has length 25 [2019-10-13 19:42:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:56,740 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 167 transitions. [2019-10-13 19:42:56,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 167 transitions. [2019-10-13 19:42:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:42:56,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:56,741 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:56,741 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1818456969, now seen corresponding path program 1 times [2019-10-13 19:42:56,742 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:56,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088399058] [2019-10-13 19:42:56,743 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,743 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:05,056 WARN L191 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 80 DAG size of output: 27 [2019-10-13 19:43:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:05,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088399058] [2019-10-13 19:43:05,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298456581] [2019-10-13 19:43:05,094 INFO L94 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 [2019-10-13 19:43:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:05,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:43:05,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:05,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:05,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 19:43:05,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95716695] [2019-10-13 19:43:05,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:43:05,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:05,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:43:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:43:05,264 INFO L87 Difference]: Start difference. First operand 109 states and 167 transitions. Second operand 8 states. [2019-10-13 19:43:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:07,465 INFO L93 Difference]: Finished difference Result 363 states and 568 transitions. [2019-10-13 19:43:07,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:43:07,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-10-13 19:43:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:07,472 INFO L225 Difference]: With dead ends: 363 [2019-10-13 19:43:07,472 INFO L226 Difference]: Without dead ends: 323 [2019-10-13 19:43:07,473 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:43:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-10-13 19:43:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 279. [2019-10-13 19:43:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2019-10-13 19:43:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 438 transitions. [2019-10-13 19:43:07,505 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 438 transitions. Word has length 27 [2019-10-13 19:43:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:07,505 INFO L462 AbstractCegarLoop]: Abstraction has 279 states and 438 transitions. [2019-10-13 19:43:07,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:43:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 438 transitions. [2019-10-13 19:43:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 19:43:07,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:07,509 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:07,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:07,711 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1113591962, now seen corresponding path program 1 times [2019-10-13 19:43:07,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:07,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126073326] [2019-10-13 19:43:07,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:07,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:07,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:43:07,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126073326] [2019-10-13 19:43:07,764 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:07,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:07,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090026812] [2019-10-13 19:43:07,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:07,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:07,766 INFO L87 Difference]: Start difference. First operand 279 states and 438 transitions. Second operand 4 states. [2019-10-13 19:43:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:08,022 INFO L93 Difference]: Finished difference Result 552 states and 865 transitions. [2019-10-13 19:43:08,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:08,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-13 19:43:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:08,024 INFO L225 Difference]: With dead ends: 552 [2019-10-13 19:43:08,025 INFO L226 Difference]: Without dead ends: 301 [2019-10-13 19:43:08,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-13 19:43:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2019-10-13 19:43:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2019-10-13 19:43:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 458 transitions. [2019-10-13 19:43:08,040 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 458 transitions. Word has length 29 [2019-10-13 19:43:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:08,041 INFO L462 AbstractCegarLoop]: Abstraction has 299 states and 458 transitions. [2019-10-13 19:43:08,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 458 transitions. [2019-10-13 19:43:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:43:08,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:08,042 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:08,042 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:08,043 INFO L82 PathProgramCache]: Analyzing trace with hash 454582667, now seen corresponding path program 1 times [2019-10-13 19:43:08,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:08,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180880395] [2019-10-13 19:43:08,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:08,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:08,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,381 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2019-10-13 19:43:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:08,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180880395] [2019-10-13 19:43:08,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189303887] [2019-10-13 19:43:08,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:43:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:43:08,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:43:08,501 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:43:08,501 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 19:43:08,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843897797] [2019-10-13 19:43:08,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:08,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:08,503 INFO L87 Difference]: Start difference. First operand 299 states and 458 transitions. Second operand 3 states. [2019-10-13 19:43:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:08,523 INFO L93 Difference]: Finished difference Result 302 states and 460 transitions. [2019-10-13 19:43:08,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:08,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-10-13 19:43:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:08,525 INFO L225 Difference]: With dead ends: 302 [2019-10-13 19:43:08,526 INFO L226 Difference]: Without dead ends: 296 [2019-10-13 19:43:08,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-10-13 19:43:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2019-10-13 19:43:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-10-13 19:43:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 446 transitions. [2019-10-13 19:43:08,539 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 446 transitions. Word has length 31 [2019-10-13 19:43:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:08,540 INFO L462 AbstractCegarLoop]: Abstraction has 295 states and 446 transitions. [2019-10-13 19:43:08,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 446 transitions. [2019-10-13 19:43:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 19:43:08,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:08,541 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:08,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:08,745 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1646630523, now seen corresponding path program 1 times [2019-10-13 19:43:08,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:08,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189855907] [2019-10-13 19:43:08,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:08,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:08,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:43:08,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189855907] [2019-10-13 19:43:08,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:08,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:08,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753746545] [2019-10-13 19:43:08,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:08,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:08,798 INFO L87 Difference]: Start difference. First operand 295 states and 446 transitions. Second operand 4 states. [2019-10-13 19:43:08,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:08,992 INFO L93 Difference]: Finished difference Result 514 states and 779 transitions. [2019-10-13 19:43:08,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:08,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-10-13 19:43:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:08,994 INFO L225 Difference]: With dead ends: 514 [2019-10-13 19:43:08,994 INFO L226 Difference]: Without dead ends: 247 [2019-10-13 19:43:08,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-10-13 19:43:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2019-10-13 19:43:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-10-13 19:43:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 365 transitions. [2019-10-13 19:43:09,006 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 365 transitions. Word has length 37 [2019-10-13 19:43:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:09,006 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 365 transitions. [2019-10-13 19:43:09,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 365 transitions. [2019-10-13 19:43:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:43:09,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:09,008 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:09,008 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash -819577482, now seen corresponding path program 1 times [2019-10-13 19:43:09,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:09,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016817047] [2019-10-13 19:43:09,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:09,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:09,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:43:09,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016817047] [2019-10-13 19:43:09,070 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:09,070 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:09,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231384551] [2019-10-13 19:43:09,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:09,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:09,072 INFO L87 Difference]: Start difference. First operand 245 states and 365 transitions. Second operand 4 states. [2019-10-13 19:43:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:09,260 INFO L93 Difference]: Finished difference Result 428 states and 636 transitions. [2019-10-13 19:43:09,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:09,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-10-13 19:43:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:09,264 INFO L225 Difference]: With dead ends: 428 [2019-10-13 19:43:09,264 INFO L226 Difference]: Without dead ends: 229 [2019-10-13 19:43:09,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-10-13 19:43:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2019-10-13 19:43:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-10-13 19:43:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 328 transitions. [2019-10-13 19:43:09,277 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 328 transitions. Word has length 41 [2019-10-13 19:43:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:09,277 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 328 transitions. [2019-10-13 19:43:09,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 328 transitions. [2019-10-13 19:43:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 19:43:09,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:09,278 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:09,279 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash 711556807, now seen corresponding path program 1 times [2019-10-13 19:43:09,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:09,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666667407] [2019-10-13 19:43:09,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:09,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:09,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 19:43:09,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666667407] [2019-10-13 19:43:09,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:09,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:09,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045477214] [2019-10-13 19:43:09,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:09,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:09,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:09,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:09,402 INFO L87 Difference]: Start difference. First operand 227 states and 328 transitions. Second operand 4 states. [2019-10-13 19:43:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:09,616 INFO L93 Difference]: Finished difference Result 309 states and 446 transitions. [2019-10-13 19:43:09,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:09,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-10-13 19:43:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:09,619 INFO L225 Difference]: With dead ends: 309 [2019-10-13 19:43:09,619 INFO L226 Difference]: Without dead ends: 147 [2019-10-13 19:43:09,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-13 19:43:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2019-10-13 19:43:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-13 19:43:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 203 transitions. [2019-10-13 19:43:09,632 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 203 transitions. Word has length 50 [2019-10-13 19:43:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:09,632 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 203 transitions. [2019-10-13 19:43:09,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 203 transitions. [2019-10-13 19:43:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 19:43:09,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:09,634 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:09,634 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash -370372205, now seen corresponding path program 1 times [2019-10-13 19:43:09,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:09,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035285145] [2019-10-13 19:43:09,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:09,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:09,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 19:43:09,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035285145] [2019-10-13 19:43:09,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407123187] [2019-10-13 19:43:09,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:43:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:10,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:43:10,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:10,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:10,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-13 19:43:10,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069516064] [2019-10-13 19:43:10,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:43:10,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:10,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:43:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:43:10,116 INFO L87 Difference]: Start difference. First operand 145 states and 203 transitions. Second operand 11 states. [2019-10-13 19:43:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:10,879 INFO L93 Difference]: Finished difference Result 171 states and 237 transitions. [2019-10-13 19:43:10,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:43:10,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-13 19:43:10,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:10,881 INFO L225 Difference]: With dead ends: 171 [2019-10-13 19:43:10,881 INFO L226 Difference]: Without dead ends: 164 [2019-10-13 19:43:10,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:43:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-13 19:43:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2019-10-13 19:43:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-13 19:43:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 224 transitions. [2019-10-13 19:43:10,895 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 224 transitions. Word has length 51 [2019-10-13 19:43:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:10,897 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 224 transitions. [2019-10-13 19:43:10,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:43:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 224 transitions. [2019-10-13 19:43:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 19:43:10,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:10,899 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:11,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:11,113 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -379328264, now seen corresponding path program 1 times [2019-10-13 19:43:11,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:11,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395028573] [2019-10-13 19:43:11,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:11,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:11,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,810 WARN L191 SmtUtils]: Spent 10.27 s on a formula simplification. DAG size of input: 157 DAG size of output: 34 [2019-10-13 19:43:32,136 WARN L191 SmtUtils]: Spent 10.26 s on a formula simplification. DAG size of input: 149 DAG size of output: 39 [2019-10-13 19:43:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:32,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395028573] [2019-10-13 19:43:32,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421817642] [2019-10-13 19:43:32,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:43:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:32,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 19:43:32,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:32,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:32,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:32,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 19:43:32,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:32,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:32,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:32,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:32,446 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:32,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 13 [2019-10-13 19:43:32,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682050238] [2019-10-13 19:43:32,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:43:32,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:32,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:43:32,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:43:32,448 INFO L87 Difference]: Start difference. First operand 162 states and 224 transitions. Second operand 13 states. [2019-10-13 19:43:33,331 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-10-13 19:43:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:34,533 INFO L93 Difference]: Finished difference Result 192 states and 260 transitions. [2019-10-13 19:43:34,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:43:34,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-10-13 19:43:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:34,539 INFO L225 Difference]: With dead ends: 192 [2019-10-13 19:43:34,540 INFO L226 Difference]: Without dead ends: 190 [2019-10-13 19:43:34,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:43:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-10-13 19:43:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2019-10-13 19:43:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-13 19:43:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 247 transitions. [2019-10-13 19:43:34,561 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 247 transitions. Word has length 61 [2019-10-13 19:43:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:34,562 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 247 transitions. [2019-10-13 19:43:34,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:43:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 247 transitions. [2019-10-13 19:43:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 19:43:34,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:34,563 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:34,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:34,774 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash 638427137, now seen corresponding path program 1 times [2019-10-13 19:43:34,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:34,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313972096] [2019-10-13 19:43:34,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:34,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:34,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:35,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313972096] [2019-10-13 19:43:35,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865313054] [2019-10-13 19:43:35,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:43:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:35,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 19:43:35,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:35,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:35,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-13 19:43:35,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053716380] [2019-10-13 19:43:35,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:43:35,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:43:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:43:35,458 INFO L87 Difference]: Start difference. First operand 178 states and 247 transitions. Second operand 11 states.