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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:45:26,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:45:26,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:45:26,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:45:26,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:45:26,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:45:26,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:45:26,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:45:26,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:45:26,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:45:26,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:45:26,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:45:26,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:45:26,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:45:26,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:45:26,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:45:26,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:45:26,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:45:26,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:45:26,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:45:26,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:45:26,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:45:26,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:45:26,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:45:26,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:45:26,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:45:26,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:45:26,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:45:26,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:45:26,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:45:26,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:45:26,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:45:26,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:45:26,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:45:26,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:45:26,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:45:26,871 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 19:45:26,885 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:45:26,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:45:26,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:45:26,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:45:26,887 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:45:26,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:45:26,887 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:45:26,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:45:26,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:45:26,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:45:26,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:45:26,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:45:26,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:45:26,894 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:45:26,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:45:26,895 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:45:26,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:45:26,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:45:26,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:45:26,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:45:26,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:45:26,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:45:26,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:45:26,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:45:26,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:45:26,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:45:26,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:45:26,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:45:26,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:45:27,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:45:27,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:45:27,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:45:27,190 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:45:27,190 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:45:27,192 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 19:45:27,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03754dd4/9109ea59b9504276b2ddd49f922403a0/FLAG09d7d575d [2019-10-13 19:45:27,816 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:45:27,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 19:45:27,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03754dd4/9109ea59b9504276b2ddd49f922403a0/FLAG09d7d575d [2019-10-13 19:45:28,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03754dd4/9109ea59b9504276b2ddd49f922403a0 [2019-10-13 19:45:28,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:45:28,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:45:28,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:45:28,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:45:28,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:45:28,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5f647f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28, skipping insertion in model container [2019-10-13 19:45:28,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,186 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:45:28,227 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:45:28,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:45:28,455 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:45:28,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:45:28,616 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:45:28,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28 WrapperNode [2019-10-13 19:45:28,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:45:28,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:45:28,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:45:28,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:45:28,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (1/1) ... [2019-10-13 19:45:28,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:45:28,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:45:28,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:45:28,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:45:28,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (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 19:45:28,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:45:28,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:45:28,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:45:28,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:45:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 19:45:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 19:45:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-13 19:45:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-13 19:45:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:45:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-13 19:45:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-13 19:45:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-13 19:45:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-13 19:45:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-13 19:45:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 19:45:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-13 19:45:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:45:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:45:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:45:29,288 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:45:29,289 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:45:29,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:29 BoogieIcfgContainer [2019-10-13 19:45:29,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:45:29,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:45:29,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:45:29,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:45:29,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:45:28" (1/3) ... [2019-10-13 19:45:29,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d0ec83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:29, skipping insertion in model container [2019-10-13 19:45:29,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:28" (2/3) ... [2019-10-13 19:45:29,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d0ec83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:29, skipping insertion in model container [2019-10-13 19:45:29,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:29" (3/3) ... [2019-10-13 19:45:29,307 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 19:45:29,318 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:45:29,337 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:45:29,349 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:45:29,372 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:45:29,373 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:45:29,373 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:45:29,373 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:45:29,374 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:45:29,374 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:45:29,374 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:45:29,374 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:45:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2019-10-13 19:45:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:45:29,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:29,405 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:29,407 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:29,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1555775493, now seen corresponding path program 1 times [2019-10-13 19:45:29,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:29,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173690991] [2019-10-13 19:45:29,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:29,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:29,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:29,933 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-10-13 19:45:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:29,998 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 19:45:30,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173690991] [2019-10-13 19:45:30,001 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:30,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:30,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137483408] [2019-10-13 19:45:30,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:30,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:30,027 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 4 states. [2019-10-13 19:45:30,249 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-13 19:45:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:30,754 INFO L93 Difference]: Finished difference Result 197 states and 307 transitions. [2019-10-13 19:45:30,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:30,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-10-13 19:45:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:30,771 INFO L225 Difference]: With dead ends: 197 [2019-10-13 19:45:30,771 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 19:45:30,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 19:45:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-10-13 19:45:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-13 19:45:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2019-10-13 19:45:30,880 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 182 transitions. Word has length 41 [2019-10-13 19:45:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:30,882 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 182 transitions. [2019-10-13 19:45:30,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 182 transitions. [2019-10-13 19:45:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:45:30,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:30,887 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:30,888 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 477079428, now seen corresponding path program 1 times [2019-10-13 19:45:30,889 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:30,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235574109] [2019-10-13 19:45:30,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:30,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:30,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:31,183 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 19:45:31,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235574109] [2019-10-13 19:45:31,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:31,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:31,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250951386] [2019-10-13 19:45:31,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:31,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:31,187 INFO L87 Difference]: Start difference. First operand 124 states and 182 transitions. Second operand 4 states. [2019-10-13 19:45:31,339 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-13 19:45:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:31,678 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2019-10-13 19:45:31,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:31,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-10-13 19:45:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:31,682 INFO L225 Difference]: With dead ends: 292 [2019-10-13 19:45:31,683 INFO L226 Difference]: Without dead ends: 192 [2019-10-13 19:45:31,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-13 19:45:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2019-10-13 19:45:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-13 19:45:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 285 transitions. [2019-10-13 19:45:31,720 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 285 transitions. Word has length 42 [2019-10-13 19:45:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:31,721 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 285 transitions. [2019-10-13 19:45:31,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 285 transitions. [2019-10-13 19:45:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:45:31,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:31,723 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:31,723 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1738555772, now seen corresponding path program 1 times [2019-10-13 19:45:31,724 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:31,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831643970] [2019-10-13 19:45:31,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:31,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:31,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:31,941 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 19:45:31,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831643970] [2019-10-13 19:45:31,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:31,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:45:31,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474170202] [2019-10-13 19:45:31,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:45:31,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:45:31,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:45:31,944 INFO L87 Difference]: Start difference. First operand 190 states and 285 transitions. Second operand 6 states. [2019-10-13 19:45:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:32,434 INFO L93 Difference]: Finished difference Result 854 states and 1329 transitions. [2019-10-13 19:45:32,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:45:32,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-10-13 19:45:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:32,440 INFO L225 Difference]: With dead ends: 854 [2019-10-13 19:45:32,441 INFO L226 Difference]: Without dead ends: 688 [2019-10-13 19:45:32,443 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:45:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-13 19:45:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 354. [2019-10-13 19:45:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-10-13 19:45:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 537 transitions. [2019-10-13 19:45:32,482 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 537 transitions. Word has length 43 [2019-10-13 19:45:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:32,483 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 537 transitions. [2019-10-13 19:45:32,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:45:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 537 transitions. [2019-10-13 19:45:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 19:45:32,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:32,485 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:32,486 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:32,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1920813121, now seen corresponding path program 1 times [2019-10-13 19:45:32,486 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:32,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830725983] [2019-10-13 19:45:32,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:32,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:32,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:32,671 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 19:45:32,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830725983] [2019-10-13 19:45:32,672 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:32,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:45:32,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802648012] [2019-10-13 19:45:32,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:45:32,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:32,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:45:32,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:45:32,674 INFO L87 Difference]: Start difference. First operand 354 states and 537 transitions. Second operand 6 states. [2019-10-13 19:45:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:33,235 INFO L93 Difference]: Finished difference Result 1232 states and 1892 transitions. [2019-10-13 19:45:33,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:45:33,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-13 19:45:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:33,241 INFO L225 Difference]: With dead ends: 1232 [2019-10-13 19:45:33,241 INFO L226 Difference]: Without dead ends: 902 [2019-10-13 19:45:33,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:45:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-10-13 19:45:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 898. [2019-10-13 19:45:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2019-10-13 19:45:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1369 transitions. [2019-10-13 19:45:33,304 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1369 transitions. Word has length 44 [2019-10-13 19:45:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:33,304 INFO L462 AbstractCegarLoop]: Abstraction has 898 states and 1369 transitions. [2019-10-13 19:45:33,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:45:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1369 transitions. [2019-10-13 19:45:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:45:33,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:33,307 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:33,307 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1112409250, now seen corresponding path program 1 times [2019-10-13 19:45:33,308 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:33,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508728222] [2019-10-13 19:45:33,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:33,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:33,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:33,444 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 19:45:33,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508728222] [2019-10-13 19:45:33,445 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:33,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:33,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910682741] [2019-10-13 19:45:33,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:33,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:33,447 INFO L87 Difference]: Start difference. First operand 898 states and 1369 transitions. Second operand 4 states. [2019-10-13 19:45:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:34,053 INFO L93 Difference]: Finished difference Result 2334 states and 3555 transitions. [2019-10-13 19:45:34,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:34,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-13 19:45:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:34,061 INFO L225 Difference]: With dead ends: 2334 [2019-10-13 19:45:34,061 INFO L226 Difference]: Without dead ends: 1460 [2019-10-13 19:45:34,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-10-13 19:45:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1458. [2019-10-13 19:45:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2019-10-13 19:45:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2185 transitions. [2019-10-13 19:45:34,188 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2185 transitions. Word has length 46 [2019-10-13 19:45:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:34,189 INFO L462 AbstractCegarLoop]: Abstraction has 1458 states and 2185 transitions. [2019-10-13 19:45:34,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2185 transitions. [2019-10-13 19:45:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:45:34,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:34,190 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:34,191 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1926406488, now seen corresponding path program 1 times [2019-10-13 19:45:34,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:34,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29879738] [2019-10-13 19:45:34,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:34,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:34,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:34,390 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 19:45:34,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29879738] [2019-10-13 19:45:34,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:34,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:45:34,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474192] [2019-10-13 19:45:34,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:45:34,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:45:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:45:34,393 INFO L87 Difference]: Start difference. First operand 1458 states and 2185 transitions. Second operand 7 states. [2019-10-13 19:45:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:35,111 INFO L93 Difference]: Finished difference Result 5648 states and 8476 transitions. [2019-10-13 19:45:35,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:45:35,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-13 19:45:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:35,133 INFO L225 Difference]: With dead ends: 5648 [2019-10-13 19:45:35,133 INFO L226 Difference]: Without dead ends: 4214 [2019-10-13 19:45:35,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:45:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2019-10-13 19:45:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 4210. [2019-10-13 19:45:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4210 states. [2019-10-13 19:45:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 6281 transitions. [2019-10-13 19:45:35,378 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 6281 transitions. Word has length 46 [2019-10-13 19:45:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:35,379 INFO L462 AbstractCegarLoop]: Abstraction has 4210 states and 6281 transitions. [2019-10-13 19:45:35,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:45:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 6281 transitions. [2019-10-13 19:45:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:45:35,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:35,381 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:35,381 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash -742396141, now seen corresponding path program 1 times [2019-10-13 19:45:35,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:35,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001552089] [2019-10-13 19:45:35,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:35,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:35,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:35,573 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 19:45:35,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001552089] [2019-10-13 19:45:35,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:35,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:45:35,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755471031] [2019-10-13 19:45:35,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:45:35,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:45:35,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:45:35,576 INFO L87 Difference]: Start difference. First operand 4210 states and 6281 transitions. Second operand 6 states. [2019-10-13 19:45:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:36,660 INFO L93 Difference]: Finished difference Result 8684 states and 12826 transitions. [2019-10-13 19:45:36,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:45:36,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-13 19:45:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:36,709 INFO L225 Difference]: With dead ends: 8684 [2019-10-13 19:45:36,709 INFO L226 Difference]: Without dead ends: 8682 [2019-10-13 19:45:36,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:45:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2019-10-13 19:45:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 4498. [2019-10-13 19:45:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-10-13 19:45:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6569 transitions. [2019-10-13 19:45:37,217 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6569 transitions. Word has length 46 [2019-10-13 19:45:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:37,218 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6569 transitions. [2019-10-13 19:45:37,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:45:37,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6569 transitions. [2019-10-13 19:45:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:45:37,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:37,220 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:37,221 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1529824191, now seen corresponding path program 1 times [2019-10-13 19:45:37,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:37,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056947802] [2019-10-13 19:45:37,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:37,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:37,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:37,382 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 19:45:37,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056947802] [2019-10-13 19:45:37,382 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:37,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:37,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015667168] [2019-10-13 19:45:37,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:37,384 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:37,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:37,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:37,384 INFO L87 Difference]: Start difference. First operand 4498 states and 6569 transitions. Second operand 4 states. [2019-10-13 19:45:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:38,124 INFO L93 Difference]: Finished difference Result 10814 states and 15783 transitions. [2019-10-13 19:45:38,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:38,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-13 19:45:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:38,157 INFO L225 Difference]: With dead ends: 10814 [2019-10-13 19:45:38,157 INFO L226 Difference]: Without dead ends: 6340 [2019-10-13 19:45:38,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2019-10-13 19:45:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6278. [2019-10-13 19:45:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2019-10-13 19:45:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9057 transitions. [2019-10-13 19:45:38,644 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9057 transitions. Word has length 47 [2019-10-13 19:45:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:38,644 INFO L462 AbstractCegarLoop]: Abstraction has 6278 states and 9057 transitions. [2019-10-13 19:45:38,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9057 transitions. [2019-10-13 19:45:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 19:45:38,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:38,649 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:38,649 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1418257868, now seen corresponding path program 1 times [2019-10-13 19:45:38,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:38,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539076521] [2019-10-13 19:45:38,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:38,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:38,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:38,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539076521] [2019-10-13 19:45:38,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780236831] [2019-10-13 19:45:38,835 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 19:45:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:39,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:45:39,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:45:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:39,165 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:45:39,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-13 19:45:39,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846121602] [2019-10-13 19:45:39,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:45:39,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:45:39,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:45:39,167 INFO L87 Difference]: Start difference. First operand 6278 states and 9057 transitions. Second operand 12 states. [2019-10-13 19:45:39,340 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2019-10-13 19:45:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:41,540 INFO L93 Difference]: Finished difference Result 20769 states and 29803 transitions. [2019-10-13 19:45:41,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:45:41,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-10-13 19:45:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:41,596 INFO L225 Difference]: With dead ends: 20769 [2019-10-13 19:45:41,597 INFO L226 Difference]: Without dead ends: 16623 [2019-10-13 19:45:41,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:45:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16623 states. [2019-10-13 19:45:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16623 to 8858. [2019-10-13 19:45:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8858 states. [2019-10-13 19:45:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 12721 transitions. [2019-10-13 19:45:42,566 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 12721 transitions. Word has length 65 [2019-10-13 19:45:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:42,566 INFO L462 AbstractCegarLoop]: Abstraction has 8858 states and 12721 transitions. [2019-10-13 19:45:42,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:45:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 12721 transitions. [2019-10-13 19:45:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 19:45:42,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:42,570 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:42,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:45:42,775 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1905093699, now seen corresponding path program 1 times [2019-10-13 19:45:42,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:42,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875707273] [2019-10-13 19:45:42,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:42,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:42,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:42,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875707273] [2019-10-13 19:45:42,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:42,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:42,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975596092] [2019-10-13 19:45:42,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:42,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:42,971 INFO L87 Difference]: Start difference. First operand 8858 states and 12721 transitions. Second operand 4 states. [2019-10-13 19:45:43,109 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-13 19:45:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:44,215 INFO L93 Difference]: Finished difference Result 14166 states and 20229 transitions. [2019-10-13 19:45:44,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:44,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-10-13 19:45:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:44,235 INFO L225 Difference]: With dead ends: 14166 [2019-10-13 19:45:44,235 INFO L226 Difference]: Without dead ends: 9283 [2019-10-13 19:45:44,246 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2019-10-13 19:45:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 7819. [2019-10-13 19:45:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7819 states. [2019-10-13 19:45:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 11025 transitions. [2019-10-13 19:45:44,889 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 11025 transitions. Word has length 65 [2019-10-13 19:45:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:44,889 INFO L462 AbstractCegarLoop]: Abstraction has 7819 states and 11025 transitions. [2019-10-13 19:45:44,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 11025 transitions. [2019-10-13 19:45:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 19:45:44,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:44,893 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:44,893 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1174779130, now seen corresponding path program 1 times [2019-10-13 19:45:44,894 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:44,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250643527] [2019-10-13 19:45:44,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:44,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:44,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:45,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250643527] [2019-10-13 19:45:45,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841607840] [2019-10-13 19:45:45,149 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 19:45:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:45,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:45:45,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:45:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:45:45,312 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:45:45,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-13 19:45:45,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758770802] [2019-10-13 19:45:45,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:45:45,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:45:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:45:45,314 INFO L87 Difference]: Start difference. First operand 7819 states and 11025 transitions. Second operand 5 states. [2019-10-13 19:45:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:46,278 INFO L93 Difference]: Finished difference Result 19725 states and 27791 transitions. [2019-10-13 19:45:46,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:46,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-10-13 19:45:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:46,305 INFO L225 Difference]: With dead ends: 19725 [2019-10-13 19:45:46,306 INFO L226 Difference]: Without dead ends: 11970 [2019-10-13 19:45:46,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:45:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11970 states. [2019-10-13 19:45:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11970 to 11857. [2019-10-13 19:45:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11857 states. [2019-10-13 19:45:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11857 states to 11857 states and 16607 transitions. [2019-10-13 19:45:47,567 INFO L78 Accepts]: Start accepts. Automaton has 11857 states and 16607 transitions. Word has length 65 [2019-10-13 19:45:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:47,567 INFO L462 AbstractCegarLoop]: Abstraction has 11857 states and 16607 transitions. [2019-10-13 19:45:47,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:45:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11857 states and 16607 transitions. [2019-10-13 19:45:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 19:45:47,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:47,571 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:47,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:45:47,775 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash 442725761, now seen corresponding path program 1 times [2019-10-13 19:45:47,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:47,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224892714] [2019-10-13 19:45:47,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:47,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:47,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:47,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224892714] [2019-10-13 19:45:47,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278250032] [2019-10-13 19:45:47,947 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 19:45:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:48,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:45:48,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:45:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:48,134 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:45:48,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-13 19:45:48,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893253419] [2019-10-13 19:45:48,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:45:48,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:45:48,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:45:48,136 INFO L87 Difference]: Start difference. First operand 11857 states and 16607 transitions. Second operand 12 states. [2019-10-13 19:45:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:50,333 INFO L93 Difference]: Finished difference Result 26538 states and 36961 transitions. [2019-10-13 19:45:50,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:45:50,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-10-13 19:45:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:50,375 INFO L225 Difference]: With dead ends: 26538 [2019-10-13 19:45:50,375 INFO L226 Difference]: Without dead ends: 22932 [2019-10-13 19:45:50,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:45:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22932 states. [2019-10-13 19:45:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22932 to 13263. [2019-10-13 19:45:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13263 states. [2019-10-13 19:45:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13263 states to 13263 states and 18540 transitions. [2019-10-13 19:45:51,324 INFO L78 Accepts]: Start accepts. Automaton has 13263 states and 18540 transitions. Word has length 65 [2019-10-13 19:45:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:51,324 INFO L462 AbstractCegarLoop]: Abstraction has 13263 states and 18540 transitions. [2019-10-13 19:45:51,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:45:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 13263 states and 18540 transitions. [2019-10-13 19:45:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 19:45:51,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:51,329 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:51,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:45:51,534 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1883912516, now seen corresponding path program 1 times [2019-10-13 19:45:51,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:51,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623072062] [2019-10-13 19:45:51,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:51,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:51,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:51,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623072062] [2019-10-13 19:45:51,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:51,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:51,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925185680] [2019-10-13 19:45:51,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:51,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:51,687 INFO L87 Difference]: Start difference. First operand 13263 states and 18540 transitions. Second operand 4 states. [2019-10-13 19:45:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:53,231 INFO L93 Difference]: Finished difference Result 23665 states and 32961 transitions. [2019-10-13 19:45:53,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:45:53,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-13 19:45:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:53,264 INFO L225 Difference]: With dead ends: 23665 [2019-10-13 19:45:53,265 INFO L226 Difference]: Without dead ends: 14152 [2019-10-13 19:45:53,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2019-10-13 19:45:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 14133. [2019-10-13 19:45:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14133 states. [2019-10-13 19:45:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14133 states to 14133 states and 19350 transitions. [2019-10-13 19:45:54,240 INFO L78 Accepts]: Start accepts. Automaton has 14133 states and 19350 transitions. Word has length 66 [2019-10-13 19:45:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:54,240 INFO L462 AbstractCegarLoop]: Abstraction has 14133 states and 19350 transitions. [2019-10-13 19:45:54,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 14133 states and 19350 transitions. [2019-10-13 19:45:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 19:45:54,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:54,244 INFO L380 BasicCegarLoop]: trace histogram [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, 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 19:45:54,245 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2075170094, now seen corresponding path program 1 times [2019-10-13 19:45:54,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:54,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335421649] [2019-10-13 19:45:54,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:54,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:54,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:54,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335421649] [2019-10-13 19:45:54,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491379808] [2019-10-13 19:45:54,552 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 19:45:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:54,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:45:54,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:45:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:45:54,755 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:45:54,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 13 [2019-10-13 19:45:54,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742378875] [2019-10-13 19:45:54,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:45:54,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:54,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:45:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:45:54,757 INFO L87 Difference]: Start difference. First operand 14133 states and 19350 transitions. Second operand 13 states. [2019-10-13 19:45:54,937 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 110