/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:10:16,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:10:16,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:10:16,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:10:16,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:10:16,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:10:16,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:10:16,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:10:16,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:10:16,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:10:16,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:10:16,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:10:16,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:10:16,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:10:16,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:10:16,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:10:16,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:10:16,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:10:16,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:10:16,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:10:16,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:10:16,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:10:16,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:10:16,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:10:16,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:10:16,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:10:16,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:10:16,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:10:16,725 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 [2019-11-23 21:10:16,742 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:10:16,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:10:16,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:10:16,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:10:16,744 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:10:16,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:10:16,744 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:10:16,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:10:16,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:10:16,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:10:16,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:10:16,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:10:16,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:10:16,746 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:10:16,746 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:10:16,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:10:16,746 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:10:16,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:10:16,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:10:16,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:10:16,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:10:16,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:10:16,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:10:16,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:10:16,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:10:16,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:10:16,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:10:16,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:10:16,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:10:16,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:10:17,050 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:10:17,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:10:17,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:10:17,072 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:10:17,073 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:10:17,074 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-11-23 21:10:17,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c329e7c9d/65a70a8c052a4490a047dc7dab189df3/FLAG78b97c57e [2019-11-23 21:10:17,951 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:10:17,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-11-23 21:10:17,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c329e7c9d/65a70a8c052a4490a047dc7dab189df3/FLAG78b97c57e [2019-11-23 21:10:18,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c329e7c9d/65a70a8c052a4490a047dc7dab189df3 [2019-11-23 21:10:18,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:10:18,070 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:10:18,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:10:18,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:10:18,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:10:18,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:18" (1/1) ... [2019-11-23 21:10:18,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a66e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:18, skipping insertion in model container [2019-11-23 21:10:18,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:18" (1/1) ... [2019-11-23 21:10:18,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:10:18,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:10:19,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:10:19,973 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:10:20,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:10:20,681 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:10:20,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20 WrapperNode [2019-11-23 21:10:20,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:10:20,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:10:20,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:10:20,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:10:20,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:20,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:10:21,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:10:21,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:10:21,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:10:21,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:21,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (1/1) ... [2019-11-23 21:10:22,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:10:22,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:10:22,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:10:22,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:10:22,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (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 [2019-11-23 21:10:22,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:10:22,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:10:29,494 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:10:29,495 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:10:29,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:29 BoogieIcfgContainer [2019-11-23 21:10:29,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:10:29,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:10:29,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:10:29,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:10:29,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:18" (1/3) ... [2019-11-23 21:10:29,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c47b670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:29, skipping insertion in model container [2019-11-23 21:10:29,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:20" (2/3) ... [2019-11-23 21:10:29,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c47b670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:29, skipping insertion in model container [2019-11-23 21:10:29,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:29" (3/3) ... [2019-11-23 21:10:29,508 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-11-23 21:10:29,517 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:10:29,526 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:10:29,536 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:10:29,582 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:10:29,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:10:29,583 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:10:29,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:10:29,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:10:29,584 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:10:29,584 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:10:29,584 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:10:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2019-11-23 21:10:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 21:10:29,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:29,631 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] [2019-11-23 21:10:29,631 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2019-11-23 21:10:29,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:29,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590944036] [2019-11-23 21:10:29,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:30,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590944036] [2019-11-23 21:10:30,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:30,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:10:30,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432983182] [2019-11-23 21:10:30,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:30,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:30,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:30,098 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 4 states. [2019-11-23 21:10:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:39,878 INFO L93 Difference]: Finished difference Result 3892 states and 7282 transitions. [2019-11-23 21:10:39,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:39,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-23 21:10:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:39,920 INFO L225 Difference]: With dead ends: 3892 [2019-11-23 21:10:39,921 INFO L226 Difference]: Without dead ends: 2706 [2019-11-23 21:10:39,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2019-11-23 21:10:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1883. [2019-11-23 21:10:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2019-11-23 21:10:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 3269 transitions. [2019-11-23 21:10:40,063 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 3269 transitions. Word has length 55 [2019-11-23 21:10:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:40,063 INFO L462 AbstractCegarLoop]: Abstraction has 1883 states and 3269 transitions. [2019-11-23 21:10:40,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 3269 transitions. [2019-11-23 21:10:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-23 21:10:40,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:40,069 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:10:40,069 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash 11423466, now seen corresponding path program 1 times [2019-11-23 21:10:40,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:40,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614580057] [2019-11-23 21:10:40,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:40,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614580057] [2019-11-23 21:10:40,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:40,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:40,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438250414] [2019-11-23 21:10:40,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:10:40,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:10:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:10:40,449 INFO L87 Difference]: Start difference. First operand 1883 states and 3269 transitions. Second operand 5 states. [2019-11-23 21:10:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:49,894 INFO L93 Difference]: Finished difference Result 6174 states and 10758 transitions. [2019-11-23 21:10:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:10:49,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2019-11-23 21:10:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:49,918 INFO L225 Difference]: With dead ends: 6174 [2019-11-23 21:10:49,918 INFO L226 Difference]: Without dead ends: 4293 [2019-11-23 21:10:49,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:10:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2019-11-23 21:10:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4264. [2019-11-23 21:10:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4264 states. [2019-11-23 21:10:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 6345 transitions. [2019-11-23 21:10:50,011 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 6345 transitions. Word has length 120 [2019-11-23 21:10:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:50,013 INFO L462 AbstractCegarLoop]: Abstraction has 4264 states and 6345 transitions. [2019-11-23 21:10:50,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:10:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 6345 transitions. [2019-11-23 21:10:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-23 21:10:50,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:50,024 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:10:50,024 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1223344377, now seen corresponding path program 1 times [2019-11-23 21:10:50,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:50,025 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384126693] [2019-11-23 21:10:50,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:50,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384126693] [2019-11-23 21:10:50,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:50,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:10:50,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812697883] [2019-11-23 21:10:50,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:50,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:50,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:10:50,301 INFO L87 Difference]: Start difference. First operand 4264 states and 6345 transitions. Second operand 3 states. [2019-11-23 21:10:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:55,279 INFO L93 Difference]: Finished difference Result 8514 states and 12982 transitions. [2019-11-23 21:10:55,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:55,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 180 [2019-11-23 21:10:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:55,304 INFO L225 Difference]: With dead ends: 8514 [2019-11-23 21:10:55,304 INFO L226 Difference]: Without dead ends: 5039 [2019-11-23 21:10:55,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:10:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5039 states. [2019-11-23 21:10:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 5038. [2019-11-23 21:10:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5038 states. [2019-11-23 21:10:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 6476 transitions. [2019-11-23 21:10:55,393 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 6476 transitions. Word has length 180 [2019-11-23 21:10:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:55,394 INFO L462 AbstractCegarLoop]: Abstraction has 5038 states and 6476 transitions. [2019-11-23 21:10:55,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 6476 transitions. [2019-11-23 21:10:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-23 21:10:55,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:55,398 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:10:55,398 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1756002671, now seen corresponding path program 1 times [2019-11-23 21:10:55,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:55,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503807240] [2019-11-23 21:10:55,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 105 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 21:10:55,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503807240] [2019-11-23 21:10:55,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927483910] [2019-11-23 21:10:55,579 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 [2019-11-23 21:10:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:55,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:55,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:55,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:55,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2019-11-23 21:10:55,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612927954] [2019-11-23 21:10:55,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:10:55,827 INFO L87 Difference]: Start difference. First operand 5038 states and 6476 transitions. Second operand 3 states. [2019-11-23 21:11:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:01,599 INFO L93 Difference]: Finished difference Result 12444 states and 16632 transitions. [2019-11-23 21:11:01,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:01,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2019-11-23 21:11:01,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:01,637 INFO L225 Difference]: With dead ends: 12444 [2019-11-23 21:11:01,637 INFO L226 Difference]: Without dead ends: 8195 [2019-11-23 21:11:01,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8195 states. [2019-11-23 21:11:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8195 to 8194. [2019-11-23 21:11:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8194 states. [2019-11-23 21:11:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8194 states to 8194 states and 10129 transitions. [2019-11-23 21:11:01,911 INFO L78 Accepts]: Start accepts. Automaton has 8194 states and 10129 transitions. Word has length 218 [2019-11-23 21:11:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:01,912 INFO L462 AbstractCegarLoop]: Abstraction has 8194 states and 10129 transitions. [2019-11-23 21:11:01,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8194 states and 10129 transitions. [2019-11-23 21:11:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-11-23 21:11:01,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:01,921 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-11-23 21:11:02,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:02,137 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash -828288935, now seen corresponding path program 1 times [2019-11-23 21:11:02,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:02,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81710457] [2019-11-23 21:11:02,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 21:11:02,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81710457] [2019-11-23 21:11:02,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:02,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:11:02,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409186905] [2019-11-23 21:11:02,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:11:02,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:11:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:11:02,389 INFO L87 Difference]: Start difference. First operand 8194 states and 10129 transitions. Second operand 3 states. [2019-11-23 21:11:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:07,695 INFO L93 Difference]: Finished difference Result 21894 states and 27592 transitions. [2019-11-23 21:11:07,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:07,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2019-11-23 21:11:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:07,743 INFO L225 Difference]: With dead ends: 21894 [2019-11-23 21:11:07,743 INFO L226 Difference]: Without dead ends: 14489 [2019-11-23 21:11:07,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:11:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14489 states. [2019-11-23 21:11:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14489 to 12126. [2019-11-23 21:11:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12126 states. [2019-11-23 21:11:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12126 states to 12126 states and 14587 transitions. [2019-11-23 21:11:07,934 INFO L78 Accepts]: Start accepts. Automaton has 12126 states and 14587 transitions. Word has length 229 [2019-11-23 21:11:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:07,935 INFO L462 AbstractCegarLoop]: Abstraction has 12126 states and 14587 transitions. [2019-11-23 21:11:07,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 12126 states and 14587 transitions. [2019-11-23 21:11:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-23 21:11:07,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:07,940 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:11:07,940 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1393067190, now seen corresponding path program 1 times [2019-11-23 21:11:07,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:07,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340350559] [2019-11-23 21:11:07,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 21:11:08,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340350559] [2019-11-23 21:11:08,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957676479] [2019-11-23 21:11:08,386 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 [2019-11-23 21:11:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:08,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:11:08,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:11:08,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:08,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:11:08,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567104035] [2019-11-23 21:11:08,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:11:08,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:11:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:11:08,601 INFO L87 Difference]: Start difference. First operand 12126 states and 14587 transitions. Second operand 3 states. [2019-11-23 21:11:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:13,141 INFO L93 Difference]: Finished difference Result 26614 states and 31766 transitions. [2019-11-23 21:11:13,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:13,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 267 [2019-11-23 21:11:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:13,168 INFO L225 Difference]: With dead ends: 26614 [2019-11-23 21:11:13,169 INFO L226 Difference]: Without dead ends: 14480 [2019-11-23 21:11:13,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:11:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2019-11-23 21:11:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2019-11-23 21:11:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14480 states. [2019-11-23 21:11:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 17065 transitions. [2019-11-23 21:11:13,383 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 17065 transitions. Word has length 267 [2019-11-23 21:11:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:13,383 INFO L462 AbstractCegarLoop]: Abstraction has 14480 states and 17065 transitions. [2019-11-23 21:11:13,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 17065 transitions. [2019-11-23 21:11:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2019-11-23 21:11:13,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:13,389 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:11:13,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:13,610 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:13,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1586820096, now seen corresponding path program 1 times [2019-11-23 21:11:13,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:13,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209339666] [2019-11-23 21:11:13,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 21:11:13,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209339666] [2019-11-23 21:11:13,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:13,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:11:13,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042764733] [2019-11-23 21:11:13,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:11:13,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:11:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:13,803 INFO L87 Difference]: Start difference. First operand 14480 states and 17065 transitions. Second operand 5 states. [2019-11-23 21:11:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:30,857 INFO L93 Difference]: Finished difference Result 64622 states and 76938 transitions. [2019-11-23 21:11:30,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:11:30,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2019-11-23 21:11:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:30,922 INFO L225 Difference]: With dead ends: 64622 [2019-11-23 21:11:30,922 INFO L226 Difference]: Without dead ends: 50931 [2019-11-23 21:11:30,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50931 states. [2019-11-23 21:11:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50931 to 47619. [2019-11-23 21:11:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47619 states. [2019-11-23 21:11:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47619 states to 47619 states and 55173 transitions. [2019-11-23 21:11:31,549 INFO L78 Accepts]: Start accepts. Automaton has 47619 states and 55173 transitions. Word has length 291 [2019-11-23 21:11:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:31,550 INFO L462 AbstractCegarLoop]: Abstraction has 47619 states and 55173 transitions. [2019-11-23 21:11:31,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:11:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 47619 states and 55173 transitions. [2019-11-23 21:11:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-11-23 21:11:31,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:31,555 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:11:31,556 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1534602178, now seen corresponding path program 1 times [2019-11-23 21:11:31,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:31,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438287736] [2019-11-23 21:11:31,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:11:32,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438287736] [2019-11-23 21:11:32,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:32,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:11:32,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289327535] [2019-11-23 21:11:32,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:11:32,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:11:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:11:32,009 INFO L87 Difference]: Start difference. First operand 47619 states and 55173 transitions. Second operand 4 states.