/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/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:21:36,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:21:36,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:21:36,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:21:36,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:21:36,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:21:36,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:21:36,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:21:36,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:21:36,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:21:36,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:21:36,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:21:36,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:21:36,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:21:36,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:21:36,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:21:36,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:21:36,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:21:36,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:21:36,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:21:36,163 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 19:21:36,192 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:21:36,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:21:36,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:21:36,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:21:36,196 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:21:36,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:21:36,196 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:21:36,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:21:36,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:21:36,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:21:36,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:21:36,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:21:36,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:21:36,199 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:21:36,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:21:36,199 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:21:36,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:21:36,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:21:36,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:21:36,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:21:36,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:21:36,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:21:36,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:21:36,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:21:36,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:21:36,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:21:36,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:21:36,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:21:36,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:21:36,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:21:36,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:21:36,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:21:36,507 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:21:36,507 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:21:36,508 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-11-06 19:21:36,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a33e667/a28603754b31481cbdb3a0cb43f0e1f7/FLAGf7806d573 [2019-11-06 19:21:37,371 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:21:37,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-11-06 19:21:37,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a33e667/a28603754b31481cbdb3a0cb43f0e1f7/FLAGf7806d573 [2019-11-06 19:21:37,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a33e667/a28603754b31481cbdb3a0cb43f0e1f7 [2019-11-06 19:21:37,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:21:37,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:21:37,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:37,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:21:37,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:21:37,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:37" (1/1) ... [2019-11-06 19:21:37,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@280d278e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:37, skipping insertion in model container [2019-11-06 19:21:37,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:37" (1/1) ... [2019-11-06 19:21:37,486 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:21:37,610 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:21:39,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:39,018 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:21:39,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:39,496 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:21:39,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39 WrapperNode [2019-11-06 19:21:39,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:39,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:21:39,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:21:39,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:21:39,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (1/1) ... [2019-11-06 19:21:39,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:21:39,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:21:39,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:21:39,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:21:39,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (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 19:21:39,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:21:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:21:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:21:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:21:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:21:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:21:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:21:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:21:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:21:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:21:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:21:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:21:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:21:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:21:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:21:43,787 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:21:43,791 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:21:43,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:43 BoogieIcfgContainer [2019-11-06 19:21:43,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:21:43,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:21:43,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:21:43,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:21:43,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:21:37" (1/3) ... [2019-11-06 19:21:43,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2421c392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:43, skipping insertion in model container [2019-11-06 19:21:43,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:39" (2/3) ... [2019-11-06 19:21:43,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2421c392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:43, skipping insertion in model container [2019-11-06 19:21:43,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:43" (3/3) ... [2019-11-06 19:21:43,811 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-11-06 19:21:43,823 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:21:43,835 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:21:43,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:21:43,891 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:21:43,891 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:21:43,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:21:43,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:21:43,892 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:21:43,892 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:21:43,892 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:21:43,892 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:21:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:21:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 19:21:43,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:43,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:21:43,953 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 118737362, now seen corresponding path program 1 times [2019-11-06 19:21:43,971 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:43,971 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067042742] [2019-11-06 19:21:43,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:44,458 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 19:21:44,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067042742] [2019-11-06 19:21:44,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:44,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:21:44,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070383606] [2019-11-06 19:21:44,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:44,468 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:21:44,483 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:21:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:53,687 INFO L93 Difference]: Finished difference Result 2984 states and 5769 transitions. [2019-11-06 19:21:53,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:21:53,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-11-06 19:21:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:53,723 INFO L225 Difference]: With dead ends: 2984 [2019-11-06 19:21:53,724 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:21:53,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:21:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:21:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2135. [2019-11-06 19:21:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2019-11-06 19:21:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3571 transitions. [2019-11-06 19:21:53,913 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3571 transitions. Word has length 69 [2019-11-06 19:21:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:53,914 INFO L462 AbstractCegarLoop]: Abstraction has 2135 states and 3571 transitions. [2019-11-06 19:21:53,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:21:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3571 transitions. [2019-11-06 19:21:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 19:21:53,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:53,923 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, 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] [2019-11-06 19:21:53,923 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1328569434, now seen corresponding path program 1 times [2019-11-06 19:21:53,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:53,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351111484] [2019-11-06 19:21:53,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:54,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351111484] [2019-11-06 19:21:54,329 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:54,329 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:21:54,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556347234] [2019-11-06 19:21:54,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:21:54,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:21:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:21:54,336 INFO L87 Difference]: Start difference. First operand 2135 states and 3571 transitions. Second operand 9 states. [2019-11-06 19:22:04,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:04,508 INFO L93 Difference]: Finished difference Result 8628 states and 14655 transitions. [2019-11-06 19:22:04,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:22:04,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 157 [2019-11-06 19:22:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:04,548 INFO L225 Difference]: With dead ends: 8628 [2019-11-06 19:22:04,548 INFO L226 Difference]: Without dead ends: 6499 [2019-11-06 19:22:04,557 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 19:22:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6499 states. [2019-11-06 19:22:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6499 to 5760. [2019-11-06 19:22:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5760 states. [2019-11-06 19:22:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5760 states to 5760 states and 8589 transitions. [2019-11-06 19:22:04,850 INFO L78 Accepts]: Start accepts. Automaton has 5760 states and 8589 transitions. Word has length 157 [2019-11-06 19:22:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:04,853 INFO L462 AbstractCegarLoop]: Abstraction has 5760 states and 8589 transitions. [2019-11-06 19:22:04,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:22:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states and 8589 transitions. [2019-11-06 19:22:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-11-06 19:22:04,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:04,871 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:04,872 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1461791282, now seen corresponding path program 1 times [2019-11-06 19:22:04,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:04,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093046239] [2019-11-06 19:22:04,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 124 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:22:05,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093046239] [2019-11-06 19:22:05,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279869716] [2019-11-06 19:22:05,351 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 19:22:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:05,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:22:05,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:22:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:22:05,645 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:22:05,646 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:22:05,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182628661] [2019-11-06 19:22:05,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:22:05,647 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:22:05,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:22:05,648 INFO L87 Difference]: Start difference. First operand 5760 states and 8589 transitions. Second operand 5 states. [2019-11-06 19:22:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:10,514 INFO L93 Difference]: Finished difference Result 13114 states and 19620 transitions. [2019-11-06 19:22:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:22:10,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2019-11-06 19:22:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:10,552 INFO L225 Difference]: With dead ends: 13114 [2019-11-06 19:22:10,553 INFO L226 Difference]: Without dead ends: 7360 [2019-11-06 19:22:10,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 274 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:22:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2019-11-06 19:22:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 7301. [2019-11-06 19:22:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7301 states. [2019-11-06 19:22:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 9872 transitions. [2019-11-06 19:22:10,858 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 9872 transitions. Word has length 275 [2019-11-06 19:22:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:10,859 INFO L462 AbstractCegarLoop]: Abstraction has 7301 states and 9872 transitions. [2019-11-06 19:22:10,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:22:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 9872 transitions. [2019-11-06 19:22:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-11-06 19:22:10,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:10,867 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, 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, 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] [2019-11-06 19:22:11,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:22:11,073 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash -289338541, now seen corresponding path program 1 times [2019-11-06 19:22:11,076 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:11,076 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906169223] [2019-11-06 19:22:11,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 122 proven. 8 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-06 19:22:11,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906169223] [2019-11-06 19:22:11,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730094453] [2019-11-06 19:22:11,484 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 19:22:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:22:11,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:22:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-06 19:22:11,775 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:22:11,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:22:11,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083920448] [2019-11-06 19:22:11,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:22:11,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:22:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:22:11,778 INFO L87 Difference]: Start difference. First operand 7301 states and 9872 transitions. Second operand 3 states.