/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/Problem03_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:00:23,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:00:23,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:00:23,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:00:23,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:00:23,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:00:23,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:00:23,382 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 19:00:23,398 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:00:23,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:00:23,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:00:23,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:00:23,400 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:00:23,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:00:23,400 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:00:23,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:00:23,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:00:23,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:00:23,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:00:23,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:00:23,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:00:23,402 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:00:23,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:00:23,402 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:00:23,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:00:23,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:00:23,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:00:23,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:00:23,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:00:23,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:00:23,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:00:23,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:00:23,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:00:23,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:00:23,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:00:23,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:00:23,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:00:23,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:00:23,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:00:23,690 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:00:23,692 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:00:23,692 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:00:23,693 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label24.c [2019-11-06 19:00:23,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/984d9d1b7/a82b0c3760874b19ac116aca20b1f066/FLAGf48e90fa4 [2019-11-06 19:00:24,422 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:00:24,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label24.c [2019-11-06 19:00:24,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/984d9d1b7/a82b0c3760874b19ac116aca20b1f066/FLAGf48e90fa4 [2019-11-06 19:00:24,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/984d9d1b7/a82b0c3760874b19ac116aca20b1f066 [2019-11-06 19:00:24,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:00:24,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:00:24,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:24,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:00:24,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:00:24,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24, skipping insertion in model container [2019-11-06 19:00:24,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,629 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:00:24,713 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:00:25,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:25,484 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:00:25,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:25,980 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:00:25,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25 WrapperNode [2019-11-06 19:00:25,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:25,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:00:25,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:00:25,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:00:25,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:25,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:26,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:26,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:26,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:26,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:26,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (1/1) ... [2019-11-06 19:00:26,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:00:26,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:00:26,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:00:26,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:00:26,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (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 19:00:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:00:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:00:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:00:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:00:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:00:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:00:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:00:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:00:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:00:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:00:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:00:28,459 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:00:28,459 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:00:28,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:28 BoogieIcfgContainer [2019-11-06 19:00:28,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:00:28,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:00:28,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:00:28,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:00:28,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:00:24" (1/3) ... [2019-11-06 19:00:28,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69610637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:28, skipping insertion in model container [2019-11-06 19:00:28,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:25" (2/3) ... [2019-11-06 19:00:28,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69610637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:28, skipping insertion in model container [2019-11-06 19:00:28,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:28" (3/3) ... [2019-11-06 19:00:28,487 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label24.c [2019-11-06 19:00:28,502 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:00:28,514 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:00:28,527 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:00:28,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:00:28,557 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:00:28,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:00:28,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:00:28,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:00:28,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:00:28,558 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:00:28,559 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:00:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:00:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-06 19:00:28,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:28,605 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:28,607 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1879577704, now seen corresponding path program 1 times [2019-11-06 19:00:28,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:28,626 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238793151] [2019-11-06 19:00:28,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:29,589 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:29,695 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 19:00:29,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238793151] [2019-11-06 19:00:29,696 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:29,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:00:29,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282689111] [2019-11-06 19:00:29,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:29,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:29,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:29,747 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:00:29,949 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:30,502 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:34,272 INFO L93 Difference]: Finished difference Result 1111 states and 1980 transitions. [2019-11-06 19:00:34,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:34,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2019-11-06 19:00:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:34,296 INFO L225 Difference]: With dead ends: 1111 [2019-11-06 19:00:34,296 INFO L226 Difference]: Without dead ends: 703 [2019-11-06 19:00:34,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:00:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-11-06 19:00:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 467. [2019-11-06 19:00:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-11-06 19:00:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 718 transitions. [2019-11-06 19:00:34,434 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 718 transitions. Word has length 197 [2019-11-06 19:00:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:34,435 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 718 transitions. [2019-11-06 19:00:34,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 718 transitions. [2019-11-06 19:00:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-06 19:00:34,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:34,443 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 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 19:00:34,445 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash 380333484, now seen corresponding path program 1 times [2019-11-06 19:00:34,446 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:34,446 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47498451] [2019-11-06 19:00:34,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:34,812 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:35,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47498451] [2019-11-06 19:00:35,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160361474] [2019-11-06 19:00:35,039 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 19:00:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:35,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:00:35,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:35,343 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:35,343 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:00:35,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443387525] [2019-11-06 19:00:35,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:35,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:35,347 INFO L87 Difference]: Start difference. First operand 467 states and 718 transitions. Second operand 5 states. [2019-11-06 19:00:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:36,965 INFO L93 Difference]: Finished difference Result 1401 states and 2184 transitions. [2019-11-06 19:00:36,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:36,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2019-11-06 19:00:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:36,976 INFO L225 Difference]: With dead ends: 1401 [2019-11-06 19:00:36,976 INFO L226 Difference]: Without dead ends: 940 [2019-11-06 19:00:36,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:36,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2019-11-06 19:00:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 924. [2019-11-06 19:00:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-11-06 19:00:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1410 transitions. [2019-11-06 19:00:37,056 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1410 transitions. Word has length 209 [2019-11-06 19:00:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:37,059 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 1410 transitions. [2019-11-06 19:00:37,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1410 transitions. [2019-11-06 19:00:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-06 19:00:37,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:37,071 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:00:37,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:37,277 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2072803421, now seen corresponding path program 1 times [2019-11-06 19:00:37,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:37,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887351261] [2019-11-06 19:00:37,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:37,540 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:37,682 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:00:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:37,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887351261] [2019-11-06 19:00:37,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:37,803 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:00:37,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917955593] [2019-11-06 19:00:37,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:00:37,813 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:00:37,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:37,814 INFO L87 Difference]: Start difference. First operand 924 states and 1410 transitions. Second operand 9 states. [2019-11-06 19:00:38,055 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:38,472 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:38,894 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:42,501 INFO L93 Difference]: Finished difference Result 3638 states and 5797 transitions. [2019-11-06 19:00:42,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:00:42,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 210 [2019-11-06 19:00:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:42,521 INFO L225 Difference]: With dead ends: 3638 [2019-11-06 19:00:42,521 INFO L226 Difference]: Without dead ends: 2720 [2019-11-06 19:00:42,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:00:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2019-11-06 19:00:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2680. [2019-11-06 19:00:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2680 states. [2019-11-06 19:00:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3915 transitions. [2019-11-06 19:00:42,638 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3915 transitions. Word has length 210 [2019-11-06 19:00:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:42,639 INFO L462 AbstractCegarLoop]: Abstraction has 2680 states and 3915 transitions. [2019-11-06 19:00:42,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:00:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3915 transitions. [2019-11-06 19:00:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-06 19:00:42,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:42,648 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:00:42,648 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1077912688, now seen corresponding path program 1 times [2019-11-06 19:00:42,649 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:42,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778824967] [2019-11-06 19:00:42,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:42,946 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:43,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778824967] [2019-11-06 19:00:43,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171980488] [2019-11-06 19:00:43,162 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 19:00:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:00:43,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:43,587 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:43,587 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:00:43,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554063417] [2019-11-06 19:00:43,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:00:43,588 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:00:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:43,589 INFO L87 Difference]: Start difference. First operand 2680 states and 3915 transitions. Second operand 3 states. [2019-11-06 19:00:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:44,613 INFO L93 Difference]: Finished difference Result 7946 states and 11955 transitions. [2019-11-06 19:00:44,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:00:44,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2019-11-06 19:00:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:44,649 INFO L225 Difference]: With dead ends: 7946 [2019-11-06 19:00:44,650 INFO L226 Difference]: Without dead ends: 5272 [2019-11-06 19:00:44,658 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5272 states. [2019-11-06 19:00:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5272 to 5234. [2019-11-06 19:00:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2019-11-06 19:00:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 7689 transitions. [2019-11-06 19:00:44,824 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 7689 transitions. Word has length 211 [2019-11-06 19:00:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:44,826 INFO L462 AbstractCegarLoop]: Abstraction has 5234 states and 7689 transitions. [2019-11-06 19:00:44,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:00:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 7689 transitions. [2019-11-06 19:00:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-06 19:00:44,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:44,843 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:45,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:45,056 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2120184752, now seen corresponding path program 1 times [2019-11-06 19:00:45,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:45,057 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434017941] [2019-11-06 19:00:45,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:45,272 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:45,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434017941] [2019-11-06 19:00:45,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672117064] [2019-11-06 19:00:45,518 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 19:00:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:45,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:00:45,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 19:00:45,853 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:45,854 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:00:45,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803570447] [2019-11-06 19:00:45,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:00:45,855 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:00:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:45,855 INFO L87 Difference]: Start difference. First operand 5234 states and 7689 transitions. Second operand 3 states. [2019-11-06 19:00:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:46,989 INFO L93 Difference]: Finished difference Result 10464 states and 15398 transitions. [2019-11-06 19:00:46,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:00:46,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2019-11-06 19:00:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:47,014 INFO L225 Difference]: With dead ends: 10464 [2019-11-06 19:00:47,015 INFO L226 Difference]: Without dead ends: 5236 [2019-11-06 19:00:47,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2019-11-06 19:00:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 5234. [2019-11-06 19:00:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2019-11-06 19:00:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 7483 transitions. [2019-11-06 19:00:47,241 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 7483 transitions. Word has length 235 [2019-11-06 19:00:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:47,248 INFO L462 AbstractCegarLoop]: Abstraction has 5234 states and 7483 transitions. [2019-11-06 19:00:47,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:00:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 7483 transitions. [2019-11-06 19:00:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-11-06 19:00:47,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:47,274 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:47,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:47,480 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1677850078, now seen corresponding path program 1 times [2019-11-06 19:00:47,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:47,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38439165] [2019-11-06 19:00:47,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:47,726 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:47,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38439165] [2019-11-06 19:00:48,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869361540] [2019-11-06 19:00:48,000 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 19:00:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:48,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:00:48,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:48,349 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:00:48,349 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:00:48,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542255595] [2019-11-06 19:00:48,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:00:48,351 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:00:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:48,351 INFO L87 Difference]: Start difference. First operand 5234 states and 7483 transitions. Second operand 8 states. [2019-11-06 19:00:48,685 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:49,085 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:53,621 INFO L93 Difference]: Finished difference Result 13355 states and 20128 transitions. [2019-11-06 19:00:53,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:00:53,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 261 [2019-11-06 19:00:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:53,660 INFO L225 Difference]: With dead ends: 13355 [2019-11-06 19:00:53,661 INFO L226 Difference]: Without dead ends: 8127 [2019-11-06 19:00:53,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:00:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2019-11-06 19:00:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 8025. [2019-11-06 19:00:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8025 states. [2019-11-06 19:00:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8025 states to 8025 states and 11366 transitions. [2019-11-06 19:00:53,957 INFO L78 Accepts]: Start accepts. Automaton has 8025 states and 11366 transitions. Word has length 261 [2019-11-06 19:00:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:53,957 INFO L462 AbstractCegarLoop]: Abstraction has 8025 states and 11366 transitions. [2019-11-06 19:00:53,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:00:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8025 states and 11366 transitions. [2019-11-06 19:00:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-06 19:00:53,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:53,990 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, 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] [2019-11-06 19:00:54,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:54,204 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -584902122, now seen corresponding path program 1 times [2019-11-06 19:00:54,205 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:54,205 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368630834] [2019-11-06 19:00:54,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,416 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:00:54,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368630834] [2019-11-06 19:00:54,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590261185] [2019-11-06 19:00:54,722 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 19:00:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:00:54,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 19:00:55,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:55,016 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:00:55,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146401270] [2019-11-06 19:00:55,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:55,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:55,019 INFO L87 Difference]: Start difference. First operand 8025 states and 11366 transitions. Second operand 5 states. [2019-11-06 19:00:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:56,919 INFO L93 Difference]: Finished difference Result 22511 states and 34173 transitions. [2019-11-06 19:00:56,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:56,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2019-11-06 19:00:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:56,985 INFO L225 Difference]: With dead ends: 22511 [2019-11-06 19:00:56,985 INFO L226 Difference]: Without dead ends: 14500 [2019-11-06 19:00:57,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:00:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14500 states. [2019-11-06 19:00:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14500 to 14334. [2019-11-06 19:00:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2019-11-06 19:00:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 19354 transitions. [2019-11-06 19:00:57,414 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 19354 transitions. Word has length 267 [2019-11-06 19:00:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:57,418 INFO L462 AbstractCegarLoop]: Abstraction has 14334 states and 19354 transitions. [2019-11-06 19:00:57,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 19354 transitions. [2019-11-06 19:00:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-11-06 19:00:57,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:57,489 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, 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] [2019-11-06 19:00:57,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:57,702 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash -264641318, now seen corresponding path program 1 times [2019-11-06 19:00:57,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:57,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438628865] [2019-11-06 19:00:57,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:57,993 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:58,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438628865] [2019-11-06 19:00:58,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449105165] [2019-11-06 19:00:58,305 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 19:00:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:58,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:00:58,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:58,703 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2019-11-06 19:00:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-06 19:00:58,751 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:58,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2019-11-06 19:00:58,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481384381] [2019-11-06 19:00:58,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:58,752 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:58,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:00:58,753 INFO L87 Difference]: Start difference. First operand 14334 states and 19354 transitions. Second operand 5 states.