/usr/bin/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/Problem15_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:15,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:15,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:15,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:16:15,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:16:15,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:16:15,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:16:15,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:16:15,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:16:15,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:16:15,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:16:15,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:16:15,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:15,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:15,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:15,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:15,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:15,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:15,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:15,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:15,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:15,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:15,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:15,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:15,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:16:15,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:15,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:15,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:15,931 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 [2019-11-06 19:16:15,957 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:15,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:15,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:15,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:15,961 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:15,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:15,961 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:15,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:15,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:15,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:15,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:15,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:15,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:15,964 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:15,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:15,964 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:15,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:15,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:15,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:15,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:15,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:15,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:15,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:15,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:15,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:15,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:15,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:15,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:15,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:16,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:16,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:16,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:16,253 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:16,253 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:16,254 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-11-06 19:16:16,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b0a9270/887ca675d32e487e951c46327f68c323/FLAGd261aa14c [2019-11-06 19:16:16,927 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:16:16,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-11-06 19:16:16,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b0a9270/887ca675d32e487e951c46327f68c323/FLAGd261aa14c [2019-11-06 19:16:17,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b0a9270/887ca675d32e487e951c46327f68c323 [2019-11-06 19:16:17,119 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:16:17,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:16:17,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:17,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:16:17,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:16:17,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ccd342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:17, skipping insertion in model container [2019-11-06 19:16:17,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:17" (1/1) ... [2019-11-06 19:16:17,137 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:16:17,212 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:16:18,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:18,117 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:16:18,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:18,560 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:16:18,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18 WrapperNode [2019-11-06 19:16:18,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:18,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:16:18,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:16:18,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:16:18,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (1/1) ... [2019-11-06 19:16:18,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:16:18,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:16:18,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:16:18,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:16:18,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (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 [2019-11-06 19:16:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:16:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:16:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:16:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:16:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:16:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:16:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:16:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:16:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:16:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:16:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:16:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:16:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:16:22,864 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:16:22,864 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:16:22,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:22 BoogieIcfgContainer [2019-11-06 19:16:22,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:16:22,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:16:22,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:16:22,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:16:22,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:16:17" (1/3) ... [2019-11-06 19:16:22,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537b689f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:22, skipping insertion in model container [2019-11-06 19:16:22,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:18" (2/3) ... [2019-11-06 19:16:22,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537b689f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:22, skipping insertion in model container [2019-11-06 19:16:22,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:22" (3/3) ... [2019-11-06 19:16:22,884 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2019-11-06 19:16:22,896 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:16:22,907 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:16:22,918 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:16:22,959 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:16:22,959 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:16:22,960 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:16:22,960 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:16:22,960 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:16:22,960 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:16:22,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:16:22,960 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:16:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:16:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 19:16:23,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:23,005 INFO L410 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, 1, 1, 1, 1, 1] [2019-11-06 19:16:23,006 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2044127672, now seen corresponding path program 1 times [2019-11-06 19:16:23,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:23,019 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776749247] [2019-11-06 19:16:23,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:23,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776749247] [2019-11-06 19:16:23,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:23,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:16:23,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593583273] [2019-11-06 19:16:23,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:23,445 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:23,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:16:23,463 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:16:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:31,005 INFO L93 Difference]: Finished difference Result 1576 states and 2877 transitions. [2019-11-06 19:16:31,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:31,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-06 19:16:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:31,034 INFO L225 Difference]: With dead ends: 1576 [2019-11-06 19:16:31,035 INFO L226 Difference]: Without dead ends: 1056 [2019-11-06 19:16:31,045 INFO L630 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 [2019-11-06 19:16:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-11-06 19:16:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1029. [2019-11-06 19:16:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2019-11-06 19:16:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1656 transitions. [2019-11-06 19:16:31,171 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1656 transitions. Word has length 52 [2019-11-06 19:16:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:31,172 INFO L462 AbstractCegarLoop]: Abstraction has 1029 states and 1656 transitions. [2019-11-06 19:16:31,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1656 transitions. [2019-11-06 19:16:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 19:16:31,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:31,180 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:31,180 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash 147073843, now seen corresponding path program 1 times [2019-11-06 19:16:31,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:31,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735396052] [2019-11-06 19:16:31,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:31,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735396052] [2019-11-06 19:16:31,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:31,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:16:31,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509836587] [2019-11-06 19:16:31,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:16:31,480 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:31,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:16:31,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:31,481 INFO L87 Difference]: Start difference. First operand 1029 states and 1656 transitions. Second operand 8 states. [2019-11-06 19:16:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:37,491 INFO L93 Difference]: Finished difference Result 3054 states and 5010 transitions. [2019-11-06 19:16:37,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:37,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2019-11-06 19:16:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:37,516 INFO L225 Difference]: With dead ends: 3054 [2019-11-06 19:16:37,516 INFO L226 Difference]: Without dead ends: 2031 [2019-11-06 19:16:37,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2019-11-06 19:16:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1984. [2019-11-06 19:16:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1984 states. [2019-11-06 19:16:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2774 transitions. [2019-11-06 19:16:37,632 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2774 transitions. Word has length 124 [2019-11-06 19:16:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:37,635 INFO L462 AbstractCegarLoop]: Abstraction has 1984 states and 2774 transitions. [2019-11-06 19:16:37,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2774 transitions. [2019-11-06 19:16:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 19:16:37,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:37,648 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:37,648 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:37,650 INFO L82 PathProgramCache]: Analyzing trace with hash -855279069, now seen corresponding path program 1 times [2019-11-06 19:16:37,650 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:37,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724757559] [2019-11-06 19:16:37,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:37,911 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724757559] [2019-11-06 19:16:37,911 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543352540] [2019-11-06 19:16:37,911 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 [2019-11-06 19:16:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:38,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:38,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:38,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:38,077 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:16:38,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372713135] [2019-11-06 19:16:38,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:16:38,079 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:38,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:16:38,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:38,080 INFO L87 Difference]: Start difference. First operand 1984 states and 2774 transitions. Second operand 3 states. [2019-11-06 19:16:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:40,687 INFO L93 Difference]: Finished difference Result 5829 states and 8292 transitions. [2019-11-06 19:16:40,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:40,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-11-06 19:16:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:40,707 INFO L225 Difference]: With dead ends: 5829 [2019-11-06 19:16:40,707 INFO L226 Difference]: Without dead ends: 3851 [2019-11-06 19:16:40,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2019-11-06 19:16:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3851. [2019-11-06 19:16:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3851 states. [2019-11-06 19:16:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5029 transitions. [2019-11-06 19:16:40,807 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5029 transitions. Word has length 132 [2019-11-06 19:16:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:40,808 INFO L462 AbstractCegarLoop]: Abstraction has 3851 states and 5029 transitions. [2019-11-06 19:16:40,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5029 transitions. [2019-11-06 19:16:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 19:16:40,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:40,811 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:41,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:41,016 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash -421349109, now seen corresponding path program 1 times [2019-11-06 19:16:41,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:41,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767024159] [2019-11-06 19:16:41,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:41,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767024159] [2019-11-06 19:16:41,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:41,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:16:41,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524670729] [2019-11-06 19:16:41,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:16:41,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:16:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:16:41,361 INFO L87 Difference]: Start difference. First operand 3851 states and 5029 transitions. Second operand 9 states. [2019-11-06 19:16:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:49,604 INFO L93 Difference]: Finished difference Result 11519 states and 15425 transitions. [2019-11-06 19:16:49,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:16:49,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 151 [2019-11-06 19:16:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:49,640 INFO L225 Difference]: With dead ends: 11519 [2019-11-06 19:16:49,640 INFO L226 Difference]: Without dead ends: 7674 [2019-11-06 19:16:49,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:16:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7674 states. [2019-11-06 19:16:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7674 to 7348. [2019-11-06 19:16:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7348 states. [2019-11-06 19:16:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 9052 transitions. [2019-11-06 19:16:49,835 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 9052 transitions. Word has length 151 [2019-11-06 19:16:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:49,837 INFO L462 AbstractCegarLoop]: Abstraction has 7348 states and 9052 transitions. [2019-11-06 19:16:49,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:16:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 9052 transitions. [2019-11-06 19:16:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-11-06 19:16:49,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:49,846 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:49,847 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 275964931, now seen corresponding path program 1 times [2019-11-06 19:16:49,847 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:49,848 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956382775] [2019-11-06 19:16:49,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:50,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956382775] [2019-11-06 19:16:50,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053636995] [2019-11-06 19:16:50,337 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 [2019-11-06 19:16:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:50,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:50,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:50,572 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:50,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:16:50,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939416355] [2019-11-06 19:16:50,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:16:50,575 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:16:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:50,575 INFO L87 Difference]: Start difference. First operand 7348 states and 9052 transitions. Second operand 3 states. [2019-11-06 19:16:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:53,115 INFO L93 Difference]: Finished difference Result 16567 states and 20948 transitions. [2019-11-06 19:16:53,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:53,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2019-11-06 19:16:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:53,155 INFO L225 Difference]: With dead ends: 16567 [2019-11-06 19:16:53,156 INFO L226 Difference]: Without dead ends: 9225 [2019-11-06 19:16:53,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9225 states. [2019-11-06 19:16:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9225 to 9224. [2019-11-06 19:16:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9224 states. [2019-11-06 19:16:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9224 states to 9224 states and 11518 transitions. [2019-11-06 19:16:53,358 INFO L78 Accepts]: Start accepts. Automaton has 9224 states and 11518 transitions. Word has length 303 [2019-11-06 19:16:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:53,359 INFO L462 AbstractCegarLoop]: Abstraction has 9224 states and 11518 transitions. [2019-11-06 19:16:53,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9224 states and 11518 transitions. [2019-11-06 19:16:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-11-06 19:16:53,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:53,366 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:53,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:53,570 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:53,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1142975225, now seen corresponding path program 1 times [2019-11-06 19:16:53,571 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:53,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883824538] [2019-11-06 19:16:53,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:16:54,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883824538] [2019-11-06 19:16:54,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652073497] [2019-11-06 19:16:54,193 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