/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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:19,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:19,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:19,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:18:19,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:18:19,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:18:19,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:18:19,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:18:19,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:18:19,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:18:19,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:18:19,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:18:19,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:19,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:19,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:19,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:19,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:19,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:19,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:19,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:19,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:19,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:19,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:19,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:19,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:19,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:19,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:19,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:19,666 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 19:18:19,680 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:19,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:19,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:19,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:19,682 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:19,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:19,682 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:19,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:19,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:19,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:19,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:19,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:19,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:19,684 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:19,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:19,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:19,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:19,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:19,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:19,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:19,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:19,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:19,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:19,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:19,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:19,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:19,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:19,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:19,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:19,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:19,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:19,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:19,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:19,998 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:19,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-11-06 19:18:20,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67edf4d9a/0f55a0131c054d2da65a8b72ea28492a/FLAG7051e62c3 [2019-11-06 19:18:20,757 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:20,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-11-06 19:18:20,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67edf4d9a/0f55a0131c054d2da65a8b72ea28492a/FLAG7051e62c3 [2019-11-06 19:18:20,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67edf4d9a/0f55a0131c054d2da65a8b72ea28492a [2019-11-06 19:18:20,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:20,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:20,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:20,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:20,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:20,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4241288f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20, skipping insertion in model container [2019-11-06 19:18:20,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:21,076 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:21,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:21,947 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:22,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:22,483 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:22,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22 WrapperNode [2019-11-06 19:18:22,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:22,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:22,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:22,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:22,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (1/1) ... [2019-11-06 19:18:22,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:22,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:22,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:22,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:22,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (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 19:18:22,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:22,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:22,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:22,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:22,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:22,767 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:22,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:22,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:22,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:25,063 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:25,067 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:25,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:25 BoogieIcfgContainer [2019-11-06 19:18:25,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:25,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:25,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:25,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:25,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:20" (1/3) ... [2019-11-06 19:18:25,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565b6f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:25, skipping insertion in model container [2019-11-06 19:18:25,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:22" (2/3) ... [2019-11-06 19:18:25,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565b6f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:25, skipping insertion in model container [2019-11-06 19:18:25,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:25" (3/3) ... [2019-11-06 19:18:25,082 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label32.c [2019-11-06 19:18:25,095 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:25,105 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:25,116 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:25,157 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:25,157 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:25,157 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:25,158 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:25,158 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:25,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:25,158 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:25,158 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 19:18:25,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:25,207 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] [2019-11-06 19:18:25,210 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash -808797987, now seen corresponding path program 1 times [2019-11-06 19:18:25,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:25,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853097127] [2019-11-06 19:18:25,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,534 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 19:18:25,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853097127] [2019-11-06 19:18:25,536 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:25,536 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:25,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465382927] [2019-11-06 19:18:25,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:25,543 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:25,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:25,561 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:30,825 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:18:30,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:30,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-11-06 19:18:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:30,853 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:30,854 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:30,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:18:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-11-06 19:18:30,984 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 54 [2019-11-06 19:18:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:30,985 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-11-06 19:18:30,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-11-06 19:18:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-06 19:18:30,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:30,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:30,998 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:30,998 INFO L82 PathProgramCache]: Analyzing trace with hash -975333715, now seen corresponding path program 1 times [2019-11-06 19:18:30,998 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:30,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901832603] [2019-11-06 19:18:30,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:31,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901832603] [2019-11-06 19:18:31,594 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:31,595 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:31,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473786487] [2019-11-06 19:18:31,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:31,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:31,598 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-11-06 19:18:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:36,626 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-11-06 19:18:36,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:36,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 189 [2019-11-06 19:18:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:36,657 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:18:36,657 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:18:36,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:18:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-11-06 19:18:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-11-06 19:18:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-11-06 19:18:36,760 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 189 [2019-11-06 19:18:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:36,762 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-11-06 19:18:36,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-11-06 19:18:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 19:18:36,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:36,768 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, 2, 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 19:18:36,769 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1806940737, now seen corresponding path program 1 times [2019-11-06 19:18:36,769 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:36,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393269545] [2019-11-06 19:18:36,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 94 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:37,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393269545] [2019-11-06 19:18:37,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498172571] [2019-11-06 19:18:37,095 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 19:18:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:37,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 19:18:37,348 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:37,349 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:37,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911248641] [2019-11-06 19:18:37,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:37,350 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:37,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:37,351 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-11-06 19:18:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:39,907 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-11-06 19:18:39,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:39,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-11-06 19:18:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:39,929 INFO L225 Difference]: With dead ends: 5192 [2019-11-06 19:18:39,930 INFO L226 Difference]: Without dead ends: 3129 [2019-11-06 19:18:39,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-11-06 19:18:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-11-06 19:18:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-11-06 19:18:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-11-06 19:18:40,021 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 224 [2019-11-06 19:18:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:40,022 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-11-06 19:18:40,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-11-06 19:18:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-11-06 19:18:40,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:40,030 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, 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, 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 19:18:40,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:40,241 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:40,241 INFO L82 PathProgramCache]: Analyzing trace with hash 484513891, now seen corresponding path program 1 times [2019-11-06 19:18:40,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:40,242 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472603434] [2019-11-06 19:18:40,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 214 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:18:40,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472603434] [2019-11-06 19:18:40,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24718828] [2019-11-06 19:18:40,656 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 19:18:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:40,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 19:18:40,942 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:40,942 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:40,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959623212] [2019-11-06 19:18:40,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:40,944 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:40,944 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-11-06 19:18:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:48,670 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-11-06 19:18:48,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:18:48,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 333 [2019-11-06 19:18:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:48,710 INFO L225 Difference]: With dead ends: 10419 [2019-11-06 19:18:48,710 INFO L226 Difference]: Without dead ends: 6317 [2019-11-06 19:18:48,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:18:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-11-06 19:18:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-11-06 19:18:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-11-06 19:18:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7568 transitions. [2019-11-06 19:18:48,963 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7568 transitions. Word has length 333 [2019-11-06 19:18:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:48,966 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7568 transitions. [2019-11-06 19:18:48,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7568 transitions. [2019-11-06 19:18:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2019-11-06 19:18:49,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:49,001 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:49,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:49,214 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1099514412, now seen corresponding path program 1 times [2019-11-06 19:18:49,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:49,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986116827] [2019-11-06 19:18:49,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 233 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:18:50,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986116827] [2019-11-06 19:18:50,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792296580] [2019-11-06 19:18:50,428 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 19:18:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:50,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 19:18:50,841 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:50,841 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:50,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746331416] [2019-11-06 19:18:50,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:50,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:50,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:50,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:50,844 INFO L87 Difference]: Start difference. First operand 5938 states and 7568 transitions. Second operand 11 states. [2019-11-06 19:18:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:56,423 INFO L93 Difference]: Finished difference Result 13329 states and 17710 transitions. [2019-11-06 19:18:56,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:18:56,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 534 [2019-11-06 19:18:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:56,462 INFO L225 Difference]: With dead ends: 13329 [2019-11-06 19:18:56,462 INFO L226 Difference]: Without dead ends: 7009 [2019-11-06 19:18:56,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:18:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2019-11-06 19:18:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6971. [2019-11-06 19:18:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2019-11-06 19:18:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 7945 transitions. [2019-11-06 19:18:56,681 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 7945 transitions. Word has length 534 [2019-11-06 19:18:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:56,682 INFO L462 AbstractCegarLoop]: Abstraction has 6971 states and 7945 transitions. [2019-11-06 19:18:56,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 7945 transitions. [2019-11-06 19:18:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2019-11-06 19:18:56,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:56,726 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2019-11-06 19:18:56,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:56,931 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash 211394213, now seen corresponding path program 1 times [2019-11-06 19:18:56,932 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:56,932 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324050777] [2019-11-06 19:18:56,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 395 proven. 460 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-11-06 19:18:58,244 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324050777] [2019-11-06 19:18:58,244 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983152404] [2019-11-06 19:18:58,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true