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/eca-rers2012/Problem14_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:50,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:50,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:50,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:50,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:50,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:50,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:50,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:50,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:50,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:50,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:50,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:50,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:50,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:50,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:50,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:50,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:50,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:50,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:50,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:50,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:50,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:50,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:50,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:50,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:50,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:50,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:50,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:50,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:50,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:50,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:50,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:50,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:50,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:50,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:50,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:50,816 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 18:02:50,831 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:50,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:50,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:50,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:50,833 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:50,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:50,833 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:50,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:50,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:50,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:50,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:50,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:50,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:50,834 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:50,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:50,835 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:50,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:50,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:50,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:50,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:50,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:50,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:50,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:50,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:50,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:50,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:50,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:50,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:50,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:51,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:51,123 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:51,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:51,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:51,129 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:51,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-10-13 18:02:51,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5113e8b/b9f6d59112bc42d0b3a4be6effb6d159/FLAG6d49666a5 [2019-10-13 18:02:51,840 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:51,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-10-13 18:02:51,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5113e8b/b9f6d59112bc42d0b3a4be6effb6d159/FLAG6d49666a5 [2019-10-13 18:02:52,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5113e8b/b9f6d59112bc42d0b3a4be6effb6d159 [2019-10-13 18:02:52,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:52,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:52,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:52,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:52,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:52,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:52,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a346ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52, skipping insertion in model container [2019-10-13 18:02:52,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:52,097 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:52,166 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:52,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:52,846 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:52,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:52,986 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:52,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52 WrapperNode [2019-10-13 18:02:52,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:52,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:52,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:52,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:53,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (1/1) ... [2019-10-13 18:02:53,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:53,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:53,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:53,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:53,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (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 18:02:53,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:53,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:53,210 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:53,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:53,211 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:54,741 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:54,743 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:54,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:54 BoogieIcfgContainer [2019-10-13 18:02:54,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:54,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:54,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:54,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:54,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:52" (1/3) ... [2019-10-13 18:02:54,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2705bf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:54, skipping insertion in model container [2019-10-13 18:02:54,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:52" (2/3) ... [2019-10-13 18:02:54,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2705bf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:54, skipping insertion in model container [2019-10-13 18:02:54,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:54" (3/3) ... [2019-10-13 18:02:54,753 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label28.c [2019-10-13 18:02:54,763 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:54,772 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:54,784 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:54,813 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:54,814 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:54,814 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:54,814 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:54,814 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:54,815 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:54,815 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:54,815 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 18:02:54,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:54,859 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:54,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1694474349, now seen corresponding path program 1 times [2019-10-13 18:02:54,874 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:54,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079084886] [2019-10-13 18:02:54,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:54,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:54,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,130 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 18:02:55,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079084886] [2019-10-13 18:02:55,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:55,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:55,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981279246] [2019-10-13 18:02:55,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:55,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:55,155 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:58,064 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-10-13 18:02:58,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:58,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-13 18:02:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:58,084 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:02:58,084 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:58,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-10-13 18:02:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-13 18:02:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-13 18:02:58,191 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 16 [2019-10-13 18:02:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:58,191 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-13 18:02:58,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-13 18:02:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 18:02:58,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:58,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:58,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1881013151, now seen corresponding path program 1 times [2019-10-13 18:02:58,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:58,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521059890] [2019-10-13 18:02:58,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:58,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:58,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:58,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521059890] [2019-10-13 18:02:58,787 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:58,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:58,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283816066] [2019-10-13 18:02:58,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:58,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:58,791 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 9 states. [2019-10-13 18:03:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:00,563 INFO L93 Difference]: Finished difference Result 970 states and 1372 transitions. [2019-10-13 18:03:00,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:03:00,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2019-10-13 18:03:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:00,572 INFO L225 Difference]: With dead ends: 970 [2019-10-13 18:03:00,572 INFO L226 Difference]: Without dead ends: 600 [2019-10-13 18:03:00,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-13 18:03:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 566. [2019-10-13 18:03:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:03:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 747 transitions. [2019-10-13 18:03:00,630 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 747 transitions. Word has length 99 [2019-10-13 18:03:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:00,631 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 747 transitions. [2019-10-13 18:03:00,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 747 transitions. [2019-10-13 18:03:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:03:00,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:00,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:00,636 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2144779955, now seen corresponding path program 1 times [2019-10-13 18:03:00,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:00,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88994548] [2019-10-13 18:03:00,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:00,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:00,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:00,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88994548] [2019-10-13 18:03:00,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857564242] [2019-10-13 18:03:00,900 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 18:03:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:01,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:01,119 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:01,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:01,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919372508] [2019-10-13 18:03:01,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:01,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:01,133 INFO L87 Difference]: Start difference. First operand 566 states and 747 transitions. Second operand 3 states. [2019-10-13 18:03:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:02,095 INFO L93 Difference]: Finished difference Result 1678 states and 2248 transitions. [2019-10-13 18:03:02,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:02,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-13 18:03:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:02,107 INFO L225 Difference]: With dead ends: 1678 [2019-10-13 18:03:02,107 INFO L226 Difference]: Without dead ends: 1118 [2019-10-13 18:03:02,109 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2019-10-13 18:03:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2019-10-13 18:03:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2019-10-13 18:03:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1443 transitions. [2019-10-13 18:03:02,147 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1443 transitions. Word has length 125 [2019-10-13 18:03:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:02,148 INFO L462 AbstractCegarLoop]: Abstraction has 1118 states and 1443 transitions. [2019-10-13 18:03:02,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1443 transitions. [2019-10-13 18:03:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 18:03:02,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:02,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:02,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:02,354 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:02,355 INFO L82 PathProgramCache]: Analyzing trace with hash 386406922, now seen corresponding path program 1 times [2019-10-13 18:03:02,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:02,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474614579] [2019-10-13 18:03:02,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:02,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:02,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:02,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474614579] [2019-10-13 18:03:02,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:02,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:03:02,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051847134] [2019-10-13 18:03:02,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:02,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:02,702 INFO L87 Difference]: Start difference. First operand 1118 states and 1443 transitions. Second operand 9 states. [2019-10-13 18:03:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:04,486 INFO L93 Difference]: Finished difference Result 2654 states and 3666 transitions. [2019-10-13 18:03:04,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:03:04,491 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 156 [2019-10-13 18:03:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:04,506 INFO L225 Difference]: With dead ends: 2654 [2019-10-13 18:03:04,506 INFO L226 Difference]: Without dead ends: 1724 [2019-10-13 18:03:04,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2019-10-13 18:03:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1694. [2019-10-13 18:03:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-10-13 18:03:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2162 transitions. [2019-10-13 18:03:04,592 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2162 transitions. Word has length 156 [2019-10-13 18:03:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:04,593 INFO L462 AbstractCegarLoop]: Abstraction has 1694 states and 2162 transitions. [2019-10-13 18:03:04,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2162 transitions. [2019-10-13 18:03:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 18:03:04,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:04,601 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:04,601 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash -380685670, now seen corresponding path program 1 times [2019-10-13 18:03:04,602 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:04,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703593286] [2019-10-13 18:03:04,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:04,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:04,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:05,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703593286] [2019-10-13 18:03:05,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48320726] [2019-10-13 18:03:05,455 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 18:03:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:05,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:05,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:05,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:05,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-10-13 18:03:05,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001807644] [2019-10-13 18:03:05,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:05,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:05,744 INFO L87 Difference]: Start difference. First operand 1694 states and 2162 transitions. Second operand 16 states. [2019-10-13 18:03:07,204 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-10-13 18:03:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:09,780 INFO L93 Difference]: Finished difference Result 3704 states and 4746 transitions. [2019-10-13 18:03:09,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 18:03:09,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 183 [2019-10-13 18:03:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:09,802 INFO L225 Difference]: With dead ends: 3704 [2019-10-13 18:03:09,802 INFO L226 Difference]: Without dead ends: 2151 [2019-10-13 18:03:09,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 18:03:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2019-10-13 18:03:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2072. [2019-10-13 18:03:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2019-10-13 18:03:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2443 transitions. [2019-10-13 18:03:09,882 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2443 transitions. Word has length 183 [2019-10-13 18:03:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:09,884 INFO L462 AbstractCegarLoop]: Abstraction has 2072 states and 2443 transitions. [2019-10-13 18:03:09,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2443 transitions. [2019-10-13 18:03:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-10-13 18:03:09,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:09,890 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:10,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:10,104 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1313841146, now seen corresponding path program 1 times [2019-10-13 18:03:10,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:10,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850458429] [2019-10-13 18:03:10,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:10,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:10,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:10,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850458429] [2019-10-13 18:03:10,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332807565] [2019-10-13 18:03:10,806 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 18:03:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:10,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 18:03:11,117 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:11,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:11,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420884393] [2019-10-13 18:03:11,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:11,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:11,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:11,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:11,119 INFO L87 Difference]: Start difference. First operand 2072 states and 2443 transitions. Second operand 9 states. [2019-10-13 18:03:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:13,260 INFO L93 Difference]: Finished difference Result 5068 states and 6144 transitions. [2019-10-13 18:03:13,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:03:13,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 318 [2019-10-13 18:03:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:13,278 INFO L225 Difference]: With dead ends: 5068 [2019-10-13 18:03:13,278 INFO L226 Difference]: Without dead ends: 3184 [2019-10-13 18:03:13,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2019-10-13 18:03:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 3002. [2019-10-13 18:03:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3002 states. [2019-10-13 18:03:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 3587 transitions. [2019-10-13 18:03:13,363 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 3587 transitions. Word has length 318 [2019-10-13 18:03:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:13,364 INFO L462 AbstractCegarLoop]: Abstraction has 3002 states and 3587 transitions. [2019-10-13 18:03:13,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 3587 transitions. [2019-10-13 18:03:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2019-10-13 18:03:13,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:13,371 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 18:03:13,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:13,577 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -962923323, now seen corresponding path program 1 times [2019-10-13 18:03:13,577 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:13,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530738703] [2019-10-13 18:03:13,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:13,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:13,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 18:03:13,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530738703] [2019-10-13 18:03:13,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319797864] [2019-10-13 18:03:13,982 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 18:03:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:14,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:14,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:14,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:14,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757005574] [2019-10-13 18:03:14,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:14,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:14,326 INFO L87 Difference]: Start difference. First operand 3002 states and 3587 transitions. Second operand 3 states. [2019-10-13 18:03:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:15,129 INFO L93 Difference]: Finished difference Result 3916 states and 4649 transitions. [2019-10-13 18:03:15,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:15,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2019-10-13 18:03:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:15,153 INFO L225 Difference]: With dead ends: 3916 [2019-10-13 18:03:15,153 INFO L226 Difference]: Without dead ends: 3914 [2019-10-13 18:03:15,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:15,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2019-10-13 18:03:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3186. [2019-10-13 18:03:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-10-13 18:03:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3827 transitions. [2019-10-13 18:03:15,254 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3827 transitions. Word has length 397 [2019-10-13 18:03:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:15,255 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 3827 transitions. [2019-10-13 18:03:15,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3827 transitions. [2019-10-13 18:03:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-10-13 18:03:15,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:15,266 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:15,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:15,478 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1507246003, now seen corresponding path program 1 times [2019-10-13 18:03:15,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:15,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108675681] [2019-10-13 18:03:15,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 288 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-10-13 18:03:16,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108675681] [2019-10-13 18:03:16,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550769348] [2019-10-13 18:03:16,460 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 18:03:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:16,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:16,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:16,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-13 18:03:16,772 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:16,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:16,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352777495] [2019-10-13 18:03:16,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:16,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:16,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:16,774 INFO L87 Difference]: Start difference. First operand 3186 states and 3827 transitions. Second operand 12 states. [2019-10-13 18:03:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:19,107 INFO L93 Difference]: Finished difference Result 6468 states and 7794 transitions. [2019-10-13 18:03:19,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:19,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 402 [2019-10-13 18:03:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:19,125 INFO L225 Difference]: With dead ends: 6468 [2019-10-13 18:03:19,125 INFO L226 Difference]: Without dead ends: 3431 [2019-10-13 18:03:19,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 419 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2019-10-13 18:03:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3186. [2019-10-13 18:03:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-10-13 18:03:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3651 transitions. [2019-10-13 18:03:19,213 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3651 transitions. Word has length 402 [2019-10-13 18:03:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:19,214 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 3651 transitions. [2019-10-13 18:03:19,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3651 transitions. [2019-10-13 18:03:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2019-10-13 18:03:19,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:19,224 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:19,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:19,428 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 386822599, now seen corresponding path program 2 times [2019-10-13 18:03:19,430 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:19,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315869136] [2019-10-13 18:03:19,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 485 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:20,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315869136] [2019-10-13 18:03:20,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100966664] [2019-10-13 18:03:20,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:20,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:20,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:20,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:20,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:20,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:20,419 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:20,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:20,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098488755] [2019-10-13 18:03:20,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:20,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:20,421 INFO L87 Difference]: Start difference. First operand 3186 states and 3651 transitions. Second operand 17 states. [2019-10-13 18:03:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:26,636 INFO L93 Difference]: Finished difference Result 6242 states and 7251 transitions. [2019-10-13 18:03:26,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-13 18:03:26,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 428 [2019-10-13 18:03:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:26,651 INFO L225 Difference]: With dead ends: 6242 [2019-10-13 18:03:26,651 INFO L226 Difference]: Without dead ends: 3244 [2019-10-13 18:03:26,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 469 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=598, Invalid=2594, Unknown=0, NotChecked=0, Total=3192 [2019-10-13 18:03:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2019-10-13 18:03:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2830. [2019-10-13 18:03:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2019-10-13 18:03:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3160 transitions. [2019-10-13 18:03:26,727 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3160 transitions. Word has length 428 [2019-10-13 18:03:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:26,728 INFO L462 AbstractCegarLoop]: Abstraction has 2830 states and 3160 transitions. [2019-10-13 18:03:26,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 18:03:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3160 transitions. [2019-10-13 18:03:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2019-10-13 18:03:26,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:26,733 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:26,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:26,937 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1074735598, now seen corresponding path program 1 times [2019-10-13 18:03:26,939 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:26,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386701849] [2019-10-13 18:03:26,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:26,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:26,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 485 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:28,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386701849] [2019-10-13 18:03:28,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197231969] [2019-10-13 18:03:28,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:28,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:28,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:28,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:28,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:28,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5251249] [2019-10-13 18:03:28,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:28,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:28,740 INFO L87 Difference]: Start difference. First operand 2830 states and 3160 transitions. Second operand 17 states.