/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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:21:40,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:21:40,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:21:40,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:21:40,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:21:40,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:21:40,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:21:40,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:21:40,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:21:40,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:21:40,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:21:40,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:21:40,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:21:40,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:21:40,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:21:40,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:21:40,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:21:40,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:21:40,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:21:40,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:21:40,404 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 19:21:40,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:21:40,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:21:40,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:21:40,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:21:40,436 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:21:40,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:21:40,437 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:21:40,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:21:40,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:21:40,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:21:40,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:21:40,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:21:40,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:21:40,439 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:21:40,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:21:40,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:21:40,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:21:40,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:21:40,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:21:40,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:21:40,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:21:40,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:21:40,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:21:40,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:21:40,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:21:40,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:21:40,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:21:40,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:21:40,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:21:40,753 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:21:40,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:21:40,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:21:40,773 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:21:40,773 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:21:40,774 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label51.c [2019-11-06 19:21:40,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d560604/de8fded142b5444f90c504e171ea6260/FLAGd155aa0e1 [2019-11-06 19:21:41,575 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:21:41,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label51.c [2019-11-06 19:21:41,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d560604/de8fded142b5444f90c504e171ea6260/FLAGd155aa0e1 [2019-11-06 19:21:41,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d560604/de8fded142b5444f90c504e171ea6260 [2019-11-06 19:21:41,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:21:41,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:21:41,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:41,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:21:41,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:21:41,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:41" (1/1) ... [2019-11-06 19:21:41,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691c9e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:41, skipping insertion in model container [2019-11-06 19:21:41,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:41" (1/1) ... [2019-11-06 19:21:41,711 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:21:41,827 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:21:43,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:43,145 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:21:43,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:43,682 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:21:43,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43 WrapperNode [2019-11-06 19:21:43,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:43,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:21:43,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:21:43,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:21:43,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:21:43,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:21:43,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:21:43,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:21:43,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (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 19:21:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:21:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:21:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:21:44,036 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:21:44,036 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:21:44,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:21:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:21:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:21:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:21:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:21:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:21:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:21:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:21:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:21:44,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:21:47,997 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:21:48,002 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:21:48,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:48 BoogieIcfgContainer [2019-11-06 19:21:48,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:21:48,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:21:48,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:21:48,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:21:48,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:21:41" (1/3) ... [2019-11-06 19:21:48,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfba37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:48, skipping insertion in model container [2019-11-06 19:21:48,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43" (2/3) ... [2019-11-06 19:21:48,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfba37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:48, skipping insertion in model container [2019-11-06 19:21:48,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:48" (3/3) ... [2019-11-06 19:21:48,024 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label51.c [2019-11-06 19:21:48,035 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:21:48,046 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:21:48,058 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:21:48,103 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:21:48,104 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:21:48,104 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:21:48,104 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:21:48,104 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:21:48,104 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:21:48,105 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:21:48,105 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:21:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:21:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 19:21:48,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:48,166 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] [2019-11-06 19:21:48,169 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1085163511, now seen corresponding path program 1 times [2019-11-06 19:21:48,187 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:48,187 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236656643] [2019-11-06 19:21:48,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:48,786 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 19:21:48,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236656643] [2019-11-06 19:21:48,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:48,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:21:48,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774201978] [2019-11-06 19:21:48,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:48,796 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:48,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:48,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:21:48,814 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:21:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:59,610 INFO L93 Difference]: Finished difference Result 3000 states and 5781 transitions. [2019-11-06 19:21:59,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:21:59,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-11-06 19:21:59,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:59,656 INFO L225 Difference]: With dead ends: 3000 [2019-11-06 19:21:59,657 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:21:59,667 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 19:21:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:21:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-11-06 19:21:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-11-06 19:21:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3344 transitions. [2019-11-06 19:21:59,840 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3344 transitions. Word has length 66 [2019-11-06 19:21:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:59,841 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3344 transitions. [2019-11-06 19:21:59,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:21:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3344 transitions. [2019-11-06 19:21:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 19:21:59,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:59,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:21:59,848 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 340179813, now seen corresponding path program 1 times [2019-11-06 19:21:59,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:59,849 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596131943] [2019-11-06 19:21:59,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:22:00,169 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596131943] [2019-11-06 19:22:00,169 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:22:00,170 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:22:00,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789616361] [2019-11-06 19:22:00,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:22:00,175 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:22:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:22:00,176 INFO L87 Difference]: Start difference. First operand 2138 states and 3344 transitions. Second operand 8 states. [2019-11-06 19:22:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:10,895 INFO L93 Difference]: Finished difference Result 8662 states and 13798 transitions. [2019-11-06 19:22:10,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:22:10,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2019-11-06 19:22:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:10,936 INFO L225 Difference]: With dead ends: 8662 [2019-11-06 19:22:10,937 INFO L226 Difference]: Without dead ends: 6530 [2019-11-06 19:22:10,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:22:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2019-11-06 19:22:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 6509. [2019-11-06 19:22:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6509 states. [2019-11-06 19:22:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 8974 transitions. [2019-11-06 19:22:11,165 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 8974 transitions. Word has length 135 [2019-11-06 19:22:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:11,167 INFO L462 AbstractCegarLoop]: Abstraction has 6509 states and 8974 transitions. [2019-11-06 19:22:11,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:22:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 8974 transitions. [2019-11-06 19:22:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-11-06 19:22:11,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:11,186 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:22:11,186 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1665750083, now seen corresponding path program 1 times [2019-11-06 19:22:11,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:11,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980448000] [2019-11-06 19:22:11,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:22:11,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980448000] [2019-11-06 19:22:11,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717421358] [2019-11-06 19:22:11,810 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 19:22:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:11,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:22:11,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:22:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:22:12,151 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:22:12,151 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:22:12,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130018826] [2019-11-06 19:22:12,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:22:12,155 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:22:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:22:12,165 INFO L87 Difference]: Start difference. First operand 6509 states and 8974 transitions. Second operand 11 states.