/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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:19,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:19,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:19,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:20:19,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:19,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:19,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:19,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:19,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:19,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:19,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:19,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:19,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:19,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:19,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:19,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:19,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:19,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:19,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:19,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:19,125 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 19:20:19,154 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:19,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:19,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:19,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:19,155 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:19,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:19,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:19,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:19,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:19,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:19,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:19,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:19,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:19,160 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:19,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:19,160 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:19,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:19,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:19,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:19,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:19,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:19,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:19,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:19,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:19,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:19,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:19,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:19,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:19,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:20:19,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:20:19,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:20:19,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:20:19,464 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:20:19,464 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:20:19,465 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-11-06 19:20:19,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/389036954/78f464c39c484c638c4129b82ee2d113/FLAG825da0d84 [2019-11-06 19:20:20,279 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:20:20,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-11-06 19:20:20,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/389036954/78f464c39c484c638c4129b82ee2d113/FLAG825da0d84 [2019-11-06 19:20:20,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/389036954/78f464c39c484c638c4129b82ee2d113 [2019-11-06 19:20:20,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:20:20,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:20:20,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:20,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:20:20,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:20:20,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:20" (1/1) ... [2019-11-06 19:20:20,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2228fab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:20, skipping insertion in model container [2019-11-06 19:20:20,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:20" (1/1) ... [2019-11-06 19:20:20,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:20:20,567 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:20:21,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:21,903 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:20:22,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:22,351 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:20:22,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22 WrapperNode [2019-11-06 19:20:22,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:22,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:20:22,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:20:22,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:20:22,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (1/1) ... [2019-11-06 19:20:22,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:20:22,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:20:22,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:20:22,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:20:22,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (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 19:20:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:20:22,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:20:22,667 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:20:22,667 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:20:22,667 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:20:22,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:20:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:20:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:20:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:20:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:20:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:20:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:20:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:20:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:20:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:20:26,572 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:20:26,577 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:20:26,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:26 BoogieIcfgContainer [2019-11-06 19:20:26,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:20:26,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:20:26,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:20:26,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:20:26,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:20:20" (1/3) ... [2019-11-06 19:20:26,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39551da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:26, skipping insertion in model container [2019-11-06 19:20:26,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:22" (2/3) ... [2019-11-06 19:20:26,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39551da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:26, skipping insertion in model container [2019-11-06 19:20:26,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:26" (3/3) ... [2019-11-06 19:20:26,595 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label18.c [2019-11-06 19:20:26,608 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:20:26,620 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:20:26,631 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:20:26,679 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:20:26,679 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:20:26,679 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:20:26,679 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:20:26,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:20:26,680 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:20:26,680 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:20:26,680 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:20:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:20:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 19:20:26,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:26,734 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] [2019-11-06 19:20:26,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 269272858, now seen corresponding path program 1 times [2019-11-06 19:20:26,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:26,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177020683] [2019-11-06 19:20:26,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:27,209 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 19:20:27,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177020683] [2019-11-06 19:20:27,210 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:27,211 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:20:27,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405386277] [2019-11-06 19:20:27,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:27,218 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:27,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:20:27,235 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:20:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:36,539 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-11-06 19:20:36,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:20:36,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-06 19:20:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:36,584 INFO L225 Difference]: With dead ends: 2984 [2019-11-06 19:20:36,584 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:20:36,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 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 19:20:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:20:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-11-06 19:20:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-11-06 19:20:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-11-06 19:20:36,774 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 63 [2019-11-06 19:20:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:36,776 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-11-06 19:20:36,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-11-06 19:20:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 19:20:36,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:36,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:36,795 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1668142983, now seen corresponding path program 1 times [2019-11-06 19:20:36,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:36,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256273447] [2019-11-06 19:20:36,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:37,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256273447] [2019-11-06 19:20:37,279 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:37,279 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:20:37,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209330314] [2019-11-06 19:20:37,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:20:37,282 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:20:37,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:20:37,282 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-11-06 19:20:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:45,765 INFO L93 Difference]: Finished difference Result 6473 states and 11554 transitions. [2019-11-06 19:20:45,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:20:45,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-11-06 19:20:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:45,793 INFO L225 Difference]: With dead ends: 6473 [2019-11-06 19:20:45,793 INFO L226 Difference]: Without dead ends: 4347 [2019-11-06 19:20:45,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:20:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-11-06 19:20:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4301. [2019-11-06 19:20:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4301 states. [2019-11-06 19:20:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 7377 transitions. [2019-11-06 19:20:45,962 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 7377 transitions. Word has length 152 [2019-11-06 19:20:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:45,963 INFO L462 AbstractCegarLoop]: Abstraction has 4301 states and 7377 transitions. [2019-11-06 19:20:45,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:20:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 7377 transitions. [2019-11-06 19:20:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 19:20:45,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:45,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:45,966 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1811597990, now seen corresponding path program 1 times [2019-11-06 19:20:45,967 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:45,967 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407535788] [2019-11-06 19:20:45,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:46,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407535788] [2019-11-06 19:20:46,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:46,158 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:20:46,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305239614] [2019-11-06 19:20:46,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:20:46,159 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:20:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:20:46,160 INFO L87 Difference]: Start difference. First operand 4301 states and 7377 transitions. Second operand 7 states. [2019-11-06 19:20:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:54,768 INFO L93 Difference]: Finished difference Result 13120 states and 22980 transitions. [2019-11-06 19:20:54,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:20:54,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-11-06 19:20:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:54,821 INFO L225 Difference]: With dead ends: 13120 [2019-11-06 19:20:54,822 INFO L226 Difference]: Without dead ends: 8825 [2019-11-06 19:20:54,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:20:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2019-11-06 19:20:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8723. [2019-11-06 19:20:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8723 states. [2019-11-06 19:20:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 13156 transitions. [2019-11-06 19:20:55,151 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 13156 transitions. Word has length 153 [2019-11-06 19:20:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:55,152 INFO L462 AbstractCegarLoop]: Abstraction has 8723 states and 13156 transitions. [2019-11-06 19:20:55,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:20:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 13156 transitions. [2019-11-06 19:20:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-06 19:20:55,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:55,156 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, 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] [2019-11-06 19:20:55,156 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1951116309, now seen corresponding path program 1 times [2019-11-06 19:20:55,157 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:55,157 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507591896] [2019-11-06 19:20:55,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 112 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:20:55,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507591896] [2019-11-06 19:20:55,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601332930] [2019-11-06 19:20:55,431 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 19:20:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:55,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:20:55,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:20:55,667 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:20:55,667 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-11-06 19:20:55,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765794675] [2019-11-06 19:20:55,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:55,669 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:55,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:55,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:20:55,669 INFO L87 Difference]: Start difference. First operand 8723 states and 13156 transitions. Second operand 5 states.