/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/Problem10_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:14,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:14,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:14,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:07:14,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:07:14,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:07:14,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:07:14,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:07:14,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:07:14,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:07:14,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:07:14,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:07:14,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:14,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:14,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:14,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:14,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:14,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:14,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:14,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:14,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:14,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:14,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:14,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:14,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:07:14,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:14,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:14,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:14,642 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 19:07:14,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:14,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:14,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:14,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:14,683 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:14,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:14,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:14,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:14,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:14,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:14,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:14,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:14,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:14,688 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:14,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:14,688 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:14,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:14,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:14,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:14,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:14,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:14,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:14,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:14,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:14,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:14,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:14,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:14,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:14,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:14,971 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:14,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:14,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:14,989 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:14,989 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:14,990 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-11-06 19:07:15,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aba6ed6b/1f488615d096424b9c95b7af06bda46e/FLAG823f18016 [2019-11-06 19:07:15,675 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:15,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-11-06 19:07:15,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aba6ed6b/1f488615d096424b9c95b7af06bda46e/FLAG823f18016 [2019-11-06 19:07:15,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aba6ed6b/1f488615d096424b9c95b7af06bda46e [2019-11-06 19:07:15,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:15,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:15,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:15,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:15,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:15,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:15" (1/1) ... [2019-11-06 19:07:15,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c92f80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:15, skipping insertion in model container [2019-11-06 19:07:15,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:15" (1/1) ... [2019-11-06 19:07:15,905 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:15,967 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:16,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:16,464 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:16,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:16,586 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:16,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16 WrapperNode [2019-11-06 19:07:16,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:16,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:16,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:16,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:16,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (1/1) ... [2019-11-06 19:07:16,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:16,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:16,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:16,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:16,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (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 19:07:16,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:16,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:16,796 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:16,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:18,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:18,138 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:18,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:18 BoogieIcfgContainer [2019-11-06 19:07:18,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:18,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:18,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:18,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:18,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:15" (1/3) ... [2019-11-06 19:07:18,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19919db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:18, skipping insertion in model container [2019-11-06 19:07:18,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:16" (2/3) ... [2019-11-06 19:07:18,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19919db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:18, skipping insertion in model container [2019-11-06 19:07:18,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:18" (3/3) ... [2019-11-06 19:07:18,148 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label58.c [2019-11-06 19:07:18,160 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:18,168 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:18,182 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:18,214 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:18,214 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:18,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:18,214 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:18,215 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:18,215 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:18,215 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:18,215 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:07:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 19:07:18,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:18,251 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:18,253 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1079521594, now seen corresponding path program 1 times [2019-11-06 19:07:18,273 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:18,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665765739] [2019-11-06 19:07:18,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:18,603 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 19:07:18,607 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665765739] [2019-11-06 19:07:18,608 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:18,608 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:07:18,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315593606] [2019-11-06 19:07:18,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:18,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:07:18,631 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:07:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:20,858 INFO L93 Difference]: Finished difference Result 745 states and 1315 transitions. [2019-11-06 19:07:20,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:07:20,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-06 19:07:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:20,891 INFO L225 Difference]: With dead ends: 745 [2019-11-06 19:07:20,892 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:07:20,904 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 19:07:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:07:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-11-06 19:07:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-11-06 19:07:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 640 transitions. [2019-11-06 19:07:21,016 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 640 transitions. Word has length 19 [2019-11-06 19:07:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:21,017 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 640 transitions. [2019-11-06 19:07:21,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:07:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 640 transitions. [2019-11-06 19:07:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 19:07:21,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:21,022 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:07:21,022 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:21,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1696713450, now seen corresponding path program 1 times [2019-11-06 19:07:21,023 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:21,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362331918] [2019-11-06 19:07:21,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:21,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362331918] [2019-11-06 19:07:21,389 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:21,389 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:07:21,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563358817] [2019-11-06 19:07:21,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:07:21,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:07:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:07:21,393 INFO L87 Difference]: Start difference. First operand 443 states and 640 transitions. Second operand 9 states. [2019-11-06 19:07:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:23,494 INFO L93 Difference]: Finished difference Result 1786 states and 2735 transitions. [2019-11-06 19:07:23,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:07:23,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2019-11-06 19:07:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:23,504 INFO L225 Difference]: With dead ends: 1786 [2019-11-06 19:07:23,505 INFO L226 Difference]: Without dead ends: 1349 [2019-11-06 19:07:23,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:07:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-11-06 19:07:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1186. [2019-11-06 19:07:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1186 states. [2019-11-06 19:07:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1682 transitions. [2019-11-06 19:07:23,594 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1682 transitions. Word has length 93 [2019-11-06 19:07:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:23,595 INFO L462 AbstractCegarLoop]: Abstraction has 1186 states and 1682 transitions. [2019-11-06 19:07:23,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:07:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1682 transitions. [2019-11-06 19:07:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 19:07:23,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:23,603 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:07:23,603 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -921580439, now seen corresponding path program 1 times [2019-11-06 19:07:23,605 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:23,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954979137] [2019-11-06 19:07:23,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:23,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954979137] [2019-11-06 19:07:23,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648286248] [2019-11-06 19:07:23,817 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 19:07:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:23,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:23,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:24,005 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:24,005 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:07:24,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469434805] [2019-11-06 19:07:24,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:07:24,012 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:07:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:24,013 INFO L87 Difference]: Start difference. First operand 1186 states and 1682 transitions. Second operand 3 states. [2019-11-06 19:07:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:24,696 INFO L93 Difference]: Finished difference Result 2807 states and 4071 transitions. [2019-11-06 19:07:24,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:07:24,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-11-06 19:07:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:24,716 INFO L225 Difference]: With dead ends: 2807 [2019-11-06 19:07:24,717 INFO L226 Difference]: Without dead ends: 1627 [2019-11-06 19:07:24,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-11-06 19:07:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1627. [2019-11-06 19:07:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2019-11-06 19:07:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2303 transitions. [2019-11-06 19:07:24,799 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2303 transitions. Word has length 98 [2019-11-06 19:07:24,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:24,800 INFO L462 AbstractCegarLoop]: Abstraction has 1627 states and 2303 transitions. [2019-11-06 19:07:24,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:07:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2303 transitions. [2019-11-06 19:07:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 19:07:24,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:24,810 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:07:25,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:25,014 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1133582729, now seen corresponding path program 1 times [2019-11-06 19:07:25,015 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:25,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477378438] [2019-11-06 19:07:25,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:25,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477378438] [2019-11-06 19:07:25,299 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:25,299 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:07:25,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834195326] [2019-11-06 19:07:25,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:07:25,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:07:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:07:25,301 INFO L87 Difference]: Start difference. First operand 1627 states and 2303 transitions. Second operand 9 states. [2019-11-06 19:07:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:26,542 INFO L93 Difference]: Finished difference Result 4045 states and 6031 transitions. [2019-11-06 19:07:26,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:07:26,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-11-06 19:07:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:26,560 INFO L225 Difference]: With dead ends: 4045 [2019-11-06 19:07:26,561 INFO L226 Difference]: Without dead ends: 2424 [2019-11-06 19:07:26,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:07:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2019-11-06 19:07:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1794. [2019-11-06 19:07:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1794 states. [2019-11-06 19:07:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2320 transitions. [2019-11-06 19:07:26,647 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2320 transitions. Word has length 114 [2019-11-06 19:07:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:26,647 INFO L462 AbstractCegarLoop]: Abstraction has 1794 states and 2320 transitions. [2019-11-06 19:07:26,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:07:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2320 transitions. [2019-11-06 19:07:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-06 19:07:26,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:26,652 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:26,652 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1256803409, now seen corresponding path program 1 times [2019-11-06 19:07:26,653 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:26,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048987955] [2019-11-06 19:07:26,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-06 19:07:26,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048987955] [2019-11-06 19:07:26,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883221442] [2019-11-06 19:07:26,903 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 19:07:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:27,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:27,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:07:27,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:27,108 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:07:27,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136587771] [2019-11-06 19:07:27,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:07:27,109 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:27,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:07:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:27,110 INFO L87 Difference]: Start difference. First operand 1794 states and 2320 transitions. Second operand 3 states. [2019-11-06 19:07:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:27,672 INFO L93 Difference]: Finished difference Result 3882 states and 5082 transitions. [2019-11-06 19:07:27,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:07:27,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-11-06 19:07:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:27,685 INFO L225 Difference]: With dead ends: 3882 [2019-11-06 19:07:27,686 INFO L226 Difference]: Without dead ends: 2094 [2019-11-06 19:07:27,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-11-06 19:07:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2019-11-06 19:07:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-11-06 19:07:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2721 transitions. [2019-11-06 19:07:27,759 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2721 transitions. Word has length 186 [2019-11-06 19:07:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:27,759 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2721 transitions. [2019-11-06 19:07:27,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:07:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2721 transitions. [2019-11-06 19:07:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 19:07:27,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:27,764 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:07:27,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:27,977 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash 566553090, now seen corresponding path program 1 times [2019-11-06 19:07:27,978 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:27,979 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214776604] [2019-11-06 19:07:27,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:07:28,374 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214776604] [2019-11-06 19:07:28,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336237074] [2019-11-06 19:07:28,382 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 19:07:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:28,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:28,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:28,542 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:07:28,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698605169] [2019-11-06 19:07:28,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:07:28,543 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:07:28,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:07:28,544 INFO L87 Difference]: Start difference. First operand 2092 states and 2721 transitions. Second operand 11 states. [2019-11-06 19:07:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:30,989 INFO L93 Difference]: Finished difference Result 4206 states and 5495 transitions. [2019-11-06 19:07:30,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 19:07:30,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 203 [2019-11-06 19:07:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:31,001 INFO L225 Difference]: With dead ends: 4206 [2019-11-06 19:07:31,002 INFO L226 Difference]: Without dead ends: 2120 [2019-11-06 19:07:31,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:07:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2019-11-06 19:07:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2094. [2019-11-06 19:07:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-11-06 19:07:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2629 transitions. [2019-11-06 19:07:31,065 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2629 transitions. Word has length 203 [2019-11-06 19:07:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:31,066 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2629 transitions. [2019-11-06 19:07:31,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:07:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2629 transitions. [2019-11-06 19:07:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-06 19:07:31,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:31,071 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:31,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:31,277 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash 405320705, now seen corresponding path program 1 times [2019-11-06 19:07:31,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:31,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394346341] [2019-11-06 19:07:31,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:07:31,719 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394346341] [2019-11-06 19:07:31,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854140957] [2019-11-06 19:07:31,720 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 [2019-11-06 19:07:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:31,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:32,058 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:32,058 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:07:32,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041677450] [2019-11-06 19:07:32,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:07:32,062 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:07:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:07:32,065 INFO L87 Difference]: Start difference. First operand 2094 states and 2629 transitions. Second operand 11 states. [2019-11-06 19:07:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:34,872 INFO L93 Difference]: Finished difference Result 4379 states and 5549 transitions. [2019-11-06 19:07:34,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:07:34,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 210 [2019-11-06 19:07:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:34,886 INFO L225 Difference]: With dead ends: 4379 [2019-11-06 19:07:34,887 INFO L226 Difference]: Without dead ends: 2291 [2019-11-06 19:07:34,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2019-11-06 19:07:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2019-11-06 19:07:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1961. [2019-11-06 19:07:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2019-11-06 19:07:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2362 transitions. [2019-11-06 19:07:34,958 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2362 transitions. Word has length 210 [2019-11-06 19:07:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:34,959 INFO L462 AbstractCegarLoop]: Abstraction has 1961 states and 2362 transitions. [2019-11-06 19:07:34,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:07:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2362 transitions. [2019-11-06 19:07:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 19:07:34,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:34,964 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:35,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:35,172 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash -908083558, now seen corresponding path program 1 times [2019-11-06 19:07:35,173 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:35,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958843609] [2019-11-06 19:07:35,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:07:35,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958843609] [2019-11-06 19:07:35,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830231561] [2019-11-06 19:07:35,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:35,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:35,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:35,652 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:35,652 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-11-06 19:07:35,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287944794] [2019-11-06 19:07:35,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:07:35,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:07:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:07:35,654 INFO L87 Difference]: Start difference. First operand 1961 states and 2362 transitions. Second operand 13 states. [2019-11-06 19:07:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:39,272 INFO L93 Difference]: Finished difference Result 6083 states and 7281 transitions. [2019-11-06 19:07:39,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:07:39,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2019-11-06 19:07:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:39,283 INFO L225 Difference]: With dead ends: 6083 [2019-11-06 19:07:39,284 INFO L226 Difference]: Without dead ends: 2664 [2019-11-06 19:07:39,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-11-06 19:07:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2019-11-06 19:07:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1937. [2019-11-06 19:07:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2019-11-06 19:07:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2150 transitions. [2019-11-06 19:07:39,340 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2150 transitions. Word has length 219 [2019-11-06 19:07:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:39,341 INFO L462 AbstractCegarLoop]: Abstraction has 1937 states and 2150 transitions. [2019-11-06 19:07:39,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:07:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2150 transitions. [2019-11-06 19:07:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-11-06 19:07:39,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:39,348 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:07:39,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:39,551 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash -836157958, now seen corresponding path program 1 times [2019-11-06 19:07:39,552 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:39,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120908927] [2019-11-06 19:07:39,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:07:39,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120908927] [2019-11-06 19:07:39,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701152802] [2019-11-06 19:07:39,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:40,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 19:07:40,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:40,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:40,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:42,228 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2019-11-06 19:07:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:42,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:42,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-06 19:07:42,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684983293] [2019-11-06 19:07:42,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:07:42,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:07:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:07:42,443 INFO L87 Difference]: Start difference. First operand 1937 states and 2150 transitions. Second operand 17 states. [2019-11-06 19:07:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:47,741 INFO L93 Difference]: Finished difference Result 6989 states and 7970 transitions. [2019-11-06 19:07:47,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:07:47,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 275 [2019-11-06 19:07:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:47,766 INFO L225 Difference]: With dead ends: 6989 [2019-11-06 19:07:47,766 INFO L226 Difference]: Without dead ends: 4909 [2019-11-06 19:07:47,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2019-11-06 19:07:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2019-11-06 19:07:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 3411. [2019-11-06 19:07:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3411 states. [2019-11-06 19:07:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 3816 transitions. [2019-11-06 19:07:47,873 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 3816 transitions. Word has length 275 [2019-11-06 19:07:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:47,873 INFO L462 AbstractCegarLoop]: Abstraction has 3411 states and 3816 transitions. [2019-11-06 19:07:47,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 19:07:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 3816 transitions. [2019-11-06 19:07:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-11-06 19:07:47,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:47,884 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:07:48,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:48,089 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 671143510, now seen corresponding path program 1 times [2019-11-06 19:07:48,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:48,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943839257] [2019-11-06 19:07:48,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 44 proven. 279 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 19:07:48,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943839257] [2019-11-06 19:07:48,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213287324] [2019-11-06 19:07:48,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:49,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 19:07:49,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:49,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:49,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms