/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/Problem16_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:39,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:39,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:39,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:39,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:39,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:39,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:39,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:39,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:39,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:39,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:39,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:39,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:39,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:39,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:39,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:39,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:39,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:39,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:39,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:39,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:39,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:39,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:39,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:39,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:39,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:39,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:39,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:39,721 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 19:19:39,752 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:39,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:39,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:39,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:39,757 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:39,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:39,758 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:39,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:39,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:39,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:39,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:39,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:39,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:39,759 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:39,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:39,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:39,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:39,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:39,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:39,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:39,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:39,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:39,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:39,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:39,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:39,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:39,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:39,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:39,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:40,051 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:40,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:40,068 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:40,070 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:40,070 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:40,071 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-11-06 19:19:40,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da70e435b/f95920f0859d4c269c73285e4a5cfac0/FLAGef27011cc [2019-11-06 19:19:40,780 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:40,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-11-06 19:19:40,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da70e435b/f95920f0859d4c269c73285e4a5cfac0/FLAGef27011cc [2019-11-06 19:19:40,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da70e435b/f95920f0859d4c269c73285e4a5cfac0 [2019-11-06 19:19:40,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:40,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:40,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:40,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:40,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:40,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:40" (1/1) ... [2019-11-06 19:19:40,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6051b70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:40, skipping insertion in model container [2019-11-06 19:19:40,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:40" (1/1) ... [2019-11-06 19:19:40,972 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:41,045 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:41,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:41,995 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:42,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:42,344 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:42,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42 WrapperNode [2019-11-06 19:19:42,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:42,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:42,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:42,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:42,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:42,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:42,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:42,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:42,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (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 19:19:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:44,978 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:44,978 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:44,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:44 BoogieIcfgContainer [2019-11-06 19:19:44,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:44,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:44,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:44,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:44,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:40" (1/3) ... [2019-11-06 19:19:44,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63340c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:44, skipping insertion in model container [2019-11-06 19:19:44,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (2/3) ... [2019-11-06 19:19:44,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63340c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:44, skipping insertion in model container [2019-11-06 19:19:44,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:44" (3/3) ... [2019-11-06 19:19:44,989 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label59.c [2019-11-06 19:19:45,002 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:45,011 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:45,024 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:45,056 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:45,056 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:45,056 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:45,056 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:45,056 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:45,057 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:45,057 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:45,057 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 19:19:45,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:45,096 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] [2019-11-06 19:19:45,098 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 441103245, now seen corresponding path program 1 times [2019-11-06 19:19:45,115 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:45,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11565530] [2019-11-06 19:19:45,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:45,465 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 19:19:45,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11565530] [2019-11-06 19:19:45,467 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:45,468 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:45,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194731925] [2019-11-06 19:19:45,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:45,477 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:45,501 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:50,536 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:19:50,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:50,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2019-11-06 19:19:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:50,569 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:19:50,569 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:50,585 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 19:19:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-11-06 19:19:50,759 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 50 [2019-11-06 19:19:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:50,761 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-11-06 19:19:50,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-11-06 19:19:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 19:19:50,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:50,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:50,781 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash -233546559, now seen corresponding path program 1 times [2019-11-06 19:19:50,783 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:50,784 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406292489] [2019-11-06 19:19:50,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:51,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406292489] [2019-11-06 19:19:51,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:51,078 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:19:51,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694951729] [2019-11-06 19:19:51,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:19:51,080 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:19:51,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:19:51,081 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-11-06 19:19:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:55,279 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-11-06 19:19:55,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:55,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2019-11-06 19:19:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:55,300 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:19:55,300 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:19:55,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:19:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:19:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-11-06 19:19:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-11-06 19:19:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-11-06 19:19:55,414 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 119 [2019-11-06 19:19:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:55,417 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-11-06 19:19:55,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:19:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-11-06 19:19:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 19:19:55,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:55,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:55,423 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -702025816, now seen corresponding path program 1 times [2019-11-06 19:19:55,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:55,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257968822] [2019-11-06 19:19:55,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:55,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257968822] [2019-11-06 19:19:55,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:55,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:55,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805503328] [2019-11-06 19:19:55,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:55,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:55,719 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-11-06 19:20:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:00,897 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-11-06 19:20:00,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:20:00,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-11-06 19:20:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:00,916 INFO L225 Difference]: With dead ends: 4170 [2019-11-06 19:20:00,916 INFO L226 Difference]: Without dead ends: 2792 [2019-11-06 19:20:00,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:20:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-11-06 19:20:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-11-06 19:20:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-11-06 19:20:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3898 transitions. [2019-11-06 19:20:01,008 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3898 transitions. Word has length 122 [2019-11-06 19:20:01,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:01,010 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3898 transitions. [2019-11-06 19:20:01,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:20:01,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3898 transitions. [2019-11-06 19:20:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 19:20:01,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:01,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:01,013 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 721853152, now seen corresponding path program 1 times [2019-11-06 19:20:01,014 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:01,014 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681059290] [2019-11-06 19:20:01,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:01,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681059290] [2019-11-06 19:20:01,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:01,275 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:20:01,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259481456] [2019-11-06 19:20:01,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:20:01,276 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:20:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:20:01,276 INFO L87 Difference]: Start difference. First operand 2773 states and 3898 transitions. Second operand 9 states. [2019-11-06 19:20:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:08,054 INFO L93 Difference]: Finished difference Result 9052 states and 13215 transitions. [2019-11-06 19:20:08,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:20:08,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 126 [2019-11-06 19:20:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:08,089 INFO L225 Difference]: With dead ends: 9052 [2019-11-06 19:20:08,090 INFO L226 Difference]: Without dead ends: 6285 [2019-11-06 19:20:08,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:20:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-11-06 19:20:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-11-06 19:20:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-11-06 19:20:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8353 transitions. [2019-11-06 19:20:08,297 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8353 transitions. Word has length 126 [2019-11-06 19:20:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:08,298 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8353 transitions. [2019-11-06 19:20:08,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:20:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8353 transitions. [2019-11-06 19:20:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 19:20:08,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:08,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:08,301 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1718542795, now seen corresponding path program 1 times [2019-11-06 19:20:08,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:08,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833106636] [2019-11-06 19:20:08,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:08,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833106636] [2019-11-06 19:20:08,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815621963] [2019-11-06 19:20:08,479 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 19:20:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:08,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:08,651 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:20:08,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:20:08,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113549630] [2019-11-06 19:20:08,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:20:08,652 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:20:08,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:20:08,653 INFO L87 Difference]: Start difference. First operand 6259 states and 8353 transitions. Second operand 3 states. [2019-11-06 19:20:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:10,297 INFO L93 Difference]: Finished difference Result 14553 states and 19739 transitions. [2019-11-06 19:20:10,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:20:10,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-11-06 19:20:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:10,338 INFO L225 Difference]: With dead ends: 14553 [2019-11-06 19:20:10,338 INFO L226 Difference]: Without dead ends: 8300 [2019-11-06 19:20:10,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:20:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2019-11-06 19:20:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 8300. [2019-11-06 19:20:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8300 states. [2019-11-06 19:20:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 10769 transitions. [2019-11-06 19:20:10,555 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 10769 transitions. Word has length 141 [2019-11-06 19:20:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:10,556 INFO L462 AbstractCegarLoop]: Abstraction has 8300 states and 10769 transitions. [2019-11-06 19:20:10,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:20:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 10769 transitions. [2019-11-06 19:20:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-11-06 19:20:10,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:10,563 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:10,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:10,770 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash -704792073, now seen corresponding path program 1 times [2019-11-06 19:20:10,772 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:10,772 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169960249] [2019-11-06 19:20:10,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 84 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:20:11,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169960249] [2019-11-06 19:20:11,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103192173] [2019-11-06 19:20:11,119 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 19:20:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:11,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 19:20:11,411 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:20:11,411 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:20:11,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605754868] [2019-11-06 19:20:11,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:20:11,424 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:20:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:20:11,425 INFO L87 Difference]: Start difference. First operand 8300 states and 10769 transitions. Second operand 3 states. [2019-11-06 19:20:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:13,269 INFO L93 Difference]: Finished difference Result 19316 states and 25228 transitions. [2019-11-06 19:20:13,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:20:13,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 312 [2019-11-06 19:20:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:13,341 INFO L225 Difference]: With dead ends: 19316 [2019-11-06 19:20:13,341 INFO L226 Difference]: Without dead ends: 11022 [2019-11-06 19:20:13,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:20:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2019-11-06 19:20:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 10007. [2019-11-06 19:20:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10007 states. [2019-11-06 19:20:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 12738 transitions. [2019-11-06 19:20:13,602 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 12738 transitions. Word has length 312 [2019-11-06 19:20:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:13,605 INFO L462 AbstractCegarLoop]: Abstraction has 10007 states and 12738 transitions. [2019-11-06 19:20:13,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:20:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 12738 transitions. [2019-11-06 19:20:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-11-06 19:20:13,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:13,621 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:20:13,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:13,826 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash 11275176, now seen corresponding path program 1 times [2019-11-06 19:20:13,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:13,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944337342] [2019-11-06 19:20:13,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 230 proven. 68 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 19:20:14,605 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944337342] [2019-11-06 19:20:14,605 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288512851] [2019-11-06 19:20:14,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:14,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:14,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-11-06 19:20:14,848 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:20:14,849 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-06 19:20:14,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913018539] [2019-11-06 19:20:14,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:20:14,850 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:14,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:20:14,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:20:14,852 INFO L87 Difference]: Start difference. First operand 10007 states and 12738 transitions. Second operand 3 states.