/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/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:09:51,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:09:51,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:09:51,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:09:51,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:09:51,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:09:51,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:09:51,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:09:51,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:09:51,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:09:51,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:09:51,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 21:09:51,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:09:51,658 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:09:51,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:09:51,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:09:51,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:09:51,660 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:09:51,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:09:51,660 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:09:51,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:09:51,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:09:51,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:09:51,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:09:51,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:09:51,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:09:51,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:09:51,662 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:09:51,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:09:51,662 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:09:51,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:09:51,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:09:51,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:09:51,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:09:51,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:09:51,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:09:51,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:09:51,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:09:51,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:09:51,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:09:51,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:09:51,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:09:51,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:09:51,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:09:51,937 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:09:51,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:09:51,942 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:09:51,943 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:09:51,943 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-11-23 21:09:52,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd701f3f/0ccde66ce0de4b34b59195d03f56ec88/FLAG67cade109 [2019-11-23 21:09:52,776 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:09:52,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-11-23 21:09:52,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd701f3f/0ccde66ce0de4b34b59195d03f56ec88/FLAG67cade109 [2019-11-23 21:09:52,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd701f3f/0ccde66ce0de4b34b59195d03f56ec88 [2019-11-23 21:09:52,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:09:52,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:09:52,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:52,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:09:52,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:09:52,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:52" (1/1) ... [2019-11-23 21:09:52,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6491a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:52, skipping insertion in model container [2019-11-23 21:09:52,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:52" (1/1) ... [2019-11-23 21:09:52,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:09:53,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:09:54,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:54,541 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:09:55,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:55,307 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:09:55,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55 WrapperNode [2019-11-23 21:09:55,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:55,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:09:55,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:09:55,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:09:55,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:09:55,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:09:55,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:09:55,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:09:55,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:55,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:56,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (1/1) ... [2019-11-23 21:09:56,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:09:56,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:09:56,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:09:56,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:09:56,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (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 21:09:56,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:09:56,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:10:01,365 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:10:01,365 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:10:01,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:01 BoogieIcfgContainer [2019-11-23 21:10:01,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:10:01,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:10:01,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:10:01,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:10:01,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:52" (1/3) ... [2019-11-23 21:10:01,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a5615f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:01, skipping insertion in model container [2019-11-23 21:10:01,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:55" (2/3) ... [2019-11-23 21:10:01,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a5615f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:01, skipping insertion in model container [2019-11-23 21:10:01,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:01" (3/3) ... [2019-11-23 21:10:01,376 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2019-11-23 21:10:01,385 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:10:01,393 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:10:01,404 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:10:01,442 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:10:01,442 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:10:01,442 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:10:01,442 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:10:01,442 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:10:01,443 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:10:01,443 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:10:01,444 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:10:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-11-23 21:10:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 21:10:01,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:01,489 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:10:01,489 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2019-11-23 21:10:01,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:01,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990076597] [2019-11-23 21:10:01,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:01,856 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 21:10:01,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990076597] [2019-11-23 21:10:01,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:01,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:10:01,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270414026] [2019-11-23 21:10:01,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:10:01,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:10:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:01,884 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 7 states. [2019-11-23 21:10:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:13,072 INFO L93 Difference]: Finished difference Result 3155 states and 6150 transitions. [2019-11-23 21:10:13,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:10:13,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 21:10:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:13,111 INFO L225 Difference]: With dead ends: 3155 [2019-11-23 21:10:13,112 INFO L226 Difference]: Without dead ends: 2265 [2019-11-23 21:10:13,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:10:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2019-11-23 21:10:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257. [2019-11-23 21:10:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:10:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions. [2019-11-23 21:10:13,258 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 18 [2019-11-23 21:10:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:13,258 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions. [2019-11-23 21:10:13,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:10:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions. [2019-11-23 21:10:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-23 21:10:13,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:13,265 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:10:13,266 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:13,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1332038177, now seen corresponding path program 1 times [2019-11-23 21:10:13,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:13,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876734323] [2019-11-23 21:10:13,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:13,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876734323] [2019-11-23 21:10:13,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315100779] [2019-11-23 21:10:13,691 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 21:10:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:13,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:10:13,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:13,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:13,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 21:10:13,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005514568] [2019-11-23 21:10:13,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:13,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:13,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:10:13,869 INFO L87 Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand 3 states. [2019-11-23 21:10:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:16,899 INFO L93 Difference]: Finished difference Result 4549 states and 6961 transitions. [2019-11-23 21:10:16,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:16,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2019-11-23 21:10:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:16,915 INFO L225 Difference]: With dead ends: 4549 [2019-11-23 21:10:16,916 INFO L226 Difference]: Without dead ends: 2257 [2019-11-23 21:10:16,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:10:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-11-23 21:10:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2019-11-23 21:10:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:10:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3227 transitions. [2019-11-23 21:10:16,975 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3227 transitions. Word has length 158 [2019-11-23 21:10:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:16,977 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 3227 transitions. [2019-11-23 21:10:16,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3227 transitions. [2019-11-23 21:10:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-23 21:10:16,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:16,993 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:17,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:17,206 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2017519598, now seen corresponding path program 1 times [2019-11-23 21:10:17,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:17,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23158179] [2019-11-23 21:10:17,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 21:10:17,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23158179] [2019-11-23 21:10:17,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445976789] [2019-11-23 21:10:17,764 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 21:10:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:17,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:17,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-23 21:10:17,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:17,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:10:17,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428606819] [2019-11-23 21:10:17,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:17,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:17,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:17,965 INFO L87 Difference]: Start difference. First operand 2257 states and 3227 transitions. Second operand 3 states. [2019-11-23 21:10:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:21,952 INFO L93 Difference]: Finished difference Result 6014 states and 8920 transitions. [2019-11-23 21:10:21,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:21,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2019-11-23 21:10:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:21,974 INFO L225 Difference]: With dead ends: 6014 [2019-11-23 21:10:21,975 INFO L226 Difference]: Without dead ends: 3759 [2019-11-23 21:10:21,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2019-11-23 21:10:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2019-11-23 21:10:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3759 states. [2019-11-23 21:10:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 4873 transitions. [2019-11-23 21:10:22,046 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 4873 transitions. Word has length 228 [2019-11-23 21:10:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:22,047 INFO L462 AbstractCegarLoop]: Abstraction has 3759 states and 4873 transitions. [2019-11-23 21:10:22,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 4873 transitions. [2019-11-23 21:10:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-11-23 21:10:22,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:22,051 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:22,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:22,254 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:22,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1339146563, now seen corresponding path program 1 times [2019-11-23 21:10:22,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:22,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985790269] [2019-11-23 21:10:22,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 21:10:22,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985790269] [2019-11-23 21:10:22,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686580541] [2019-11-23 21:10:22,499 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 [2019-11-23 21:10:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:22,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:22,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 21:10:22,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:22,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 21:10:22,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017250240] [2019-11-23 21:10:22,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:22,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:22,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:10:22,725 INFO L87 Difference]: Start difference. First operand 3759 states and 4873 transitions. Second operand 3 states. [2019-11-23 21:10:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:26,893 INFO L93 Difference]: Finished difference Result 9018 states and 12212 transitions. [2019-11-23 21:10:26,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:26,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2019-11-23 21:10:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:26,918 INFO L225 Difference]: With dead ends: 9018 [2019-11-23 21:10:26,918 INFO L226 Difference]: Without dead ends: 5261 [2019-11-23 21:10:26,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 232 SyntacticMatches, 1 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 21:10:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2019-11-23 21:10:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2019-11-23 21:10:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5261 states. [2019-11-23 21:10:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6747 transitions. [2019-11-23 21:10:27,026 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6747 transitions. Word has length 233 [2019-11-23 21:10:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:27,027 INFO L462 AbstractCegarLoop]: Abstraction has 5261 states and 6747 transitions. [2019-11-23 21:10:27,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6747 transitions. [2019-11-23 21:10:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-23 21:10:27,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:27,034 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-23 21:10:27,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:27,238 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1077329367, now seen corresponding path program 1 times [2019-11-23 21:10:27,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:27,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027541343] [2019-11-23 21:10:27,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 21:10:27,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027541343] [2019-11-23 21:10:27,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293545229] [2019-11-23 21:10:27,620 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 [2019-11-23 21:10:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:27,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:27,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:27,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:27,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:10:27,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704074870] [2019-11-23 21:10:27,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:27,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:27,762 INFO L87 Difference]: Start difference. First operand 5261 states and 6747 transitions. Second operand 3 states. [2019-11-23 21:10:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:31,714 INFO L93 Difference]: Finished difference Result 15026 states and 19480 transitions. [2019-11-23 21:10:31,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:31,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2019-11-23 21:10:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:31,752 INFO L225 Difference]: With dead ends: 15026 [2019-11-23 21:10:31,752 INFO L226 Difference]: Without dead ends: 8265 [2019-11-23 21:10:31,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2019-11-23 21:10:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 8265. [2019-11-23 21:10:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8265 states. [2019-11-23 21:10:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 10102 transitions. [2019-11-23 21:10:31,940 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 10102 transitions. Word has length 241 [2019-11-23 21:10:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:31,941 INFO L462 AbstractCegarLoop]: Abstraction has 8265 states and 10102 transitions. [2019-11-23 21:10:31,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 10102 transitions. [2019-11-23 21:10:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-23 21:10:31,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:31,949 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-23 21:10:32,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:32,162 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1179223581, now seen corresponding path program 1 times [2019-11-23 21:10:32,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:32,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964526170] [2019-11-23 21:10:32,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 21:10:32,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964526170] [2019-11-23 21:10:32,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:32,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:32,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087291198] [2019-11-23 21:10:32,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:32,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:32,397 INFO L87 Difference]: Start difference. First operand 8265 states and 10102 transitions. Second operand 4 states. [2019-11-23 21:10:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:39,128 INFO L93 Difference]: Finished difference Result 31548 states and 38888 transitions. [2019-11-23 21:10:39,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:39,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 258 [2019-11-23 21:10:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:39,189 INFO L225 Difference]: With dead ends: 31548 [2019-11-23 21:10:39,189 INFO L226 Difference]: Without dead ends: 23285 [2019-11-23 21:10:39,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:10:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23285 states. [2019-11-23 21:10:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23285 to 21783. [2019-11-23 21:10:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21783 states. [2019-11-23 21:10:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21783 states to 21783 states and 26426 transitions. [2019-11-23 21:10:39,558 INFO L78 Accepts]: Start accepts. Automaton has 21783 states and 26426 transitions. Word has length 258 [2019-11-23 21:10:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:39,560 INFO L462 AbstractCegarLoop]: Abstraction has 21783 states and 26426 transitions. [2019-11-23 21:10:39,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21783 states and 26426 transitions. [2019-11-23 21:10:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2019-11-23 21:10:39,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:39,569 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-11-23 21:10:39,569 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:39,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2120391270, now seen corresponding path program 1 times [2019-11-23 21:10:39,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:39,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061720694] [2019-11-23 21:10:39,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 21:10:39,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061720694] [2019-11-23 21:10:39,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:39,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:39,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984238875] [2019-11-23 21:10:39,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:39,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:39,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:39,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:39,862 INFO L87 Difference]: Start difference. First operand 21783 states and 26426 transitions. Second operand 4 states. [2019-11-23 21:10:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:45,985 INFO L93 Difference]: Finished difference Result 43564 states and 52850 transitions. [2019-11-23 21:10:45,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:45,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2019-11-23 21:10:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:46,037 INFO L225 Difference]: With dead ends: 43564 [2019-11-23 21:10:46,037 INFO L226 Difference]: Without dead ends: 21783 [2019-11-23 21:10:46,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:10:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21783 states. [2019-11-23 21:10:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 21783. [2019-11-23 21:10:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21783 states. [2019-11-23 21:10:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21783 states to 21783 states and 25950 transitions. [2019-11-23 21:10:46,446 INFO L78 Accepts]: Start accepts. Automaton has 21783 states and 25950 transitions. Word has length 377 [2019-11-23 21:10:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:46,446 INFO L462 AbstractCegarLoop]: Abstraction has 21783 states and 25950 transitions. [2019-11-23 21:10:46,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21783 states and 25950 transitions. [2019-11-23 21:10:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2019-11-23 21:10:46,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:46,456 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-11-23 21:10:46,457 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash -443370662, now seen corresponding path program 1 times [2019-11-23 21:10:46,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:46,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335645089] [2019-11-23 21:10:46,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-23 21:10:46,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335645089] [2019-11-23 21:10:46,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:46,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:46,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832522200] [2019-11-23 21:10:46,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:46,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:46,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:46,712 INFO L87 Difference]: Start difference. First operand 21783 states and 25950 transitions. Second operand 4 states. [2019-11-23 21:10:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:52,990 INFO L93 Difference]: Finished difference Result 56331 states and 66243 transitions. [2019-11-23 21:10:52,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:52,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 388 [2019-11-23 21:10:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:53,044 INFO L225 Difference]: With dead ends: 56331 [2019-11-23 21:10:53,045 INFO L226 Difference]: Without dead ends: 33799 [2019-11-23 21:10:53,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:10:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33799 states. [2019-11-23 21:10:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33799 to 30795. [2019-11-23 21:10:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30795 states. [2019-11-23 21:10:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30795 states to 30795 states and 34698 transitions. [2019-11-23 21:10:53,471 INFO L78 Accepts]: Start accepts. Automaton has 30795 states and 34698 transitions. Word has length 388 [2019-11-23 21:10:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:53,472 INFO L462 AbstractCegarLoop]: Abstraction has 30795 states and 34698 transitions. [2019-11-23 21:10:53,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30795 states and 34698 transitions. [2019-11-23 21:10:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2019-11-23 21:10:53,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:53,481 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:10:53,481 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1270038981, now seen corresponding path program 1 times [2019-11-23 21:10:53,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:53,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619141365] [2019-11-23 21:10:53,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 339 proven. 65 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 21:10:53,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619141365] [2019-11-23 21:10:53,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241923328] [2019-11-23 21:10:53,925 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 [2019-11-23 21:10:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:54,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:54,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2019-11-23 21:10:54,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:54,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-23 21:10:54,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192391754] [2019-11-23 21:10:54,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:54,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:54,393 INFO L87 Difference]: Start difference. First operand 30795 states and 34698 transitions. Second operand 3 states. [2019-11-23 21:10:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:58,708 INFO L93 Difference]: Finished difference Result 63090 states and 71604 transitions. [2019-11-23 21:10:58,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:58,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2019-11-23 21:10:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:58,749 INFO L225 Difference]: With dead ends: 63090 [2019-11-23 21:10:58,749 INFO L226 Difference]: Without dead ends: 33048 [2019-11-23 21:10:58,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33048 states. [2019-11-23 21:10:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33048 to 33048. [2019-11-23 21:10:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33048 states. [2019-11-23 21:10:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33048 states to 33048 states and 36761 transitions. [2019-11-23 21:10:59,126 INFO L78 Accepts]: Start accepts. Automaton has 33048 states and 36761 transitions. Word has length 415 [2019-11-23 21:10:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:59,126 INFO L462 AbstractCegarLoop]: Abstraction has 33048 states and 36761 transitions. [2019-11-23 21:10:59,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 33048 states and 36761 transitions. [2019-11-23 21:10:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2019-11-23 21:10:59,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:59,137 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:59,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:59,340 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1923606592, now seen corresponding path program 1 times [2019-11-23 21:10:59,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:59,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498016144] [2019-11-23 21:10:59,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 319 proven. 24 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-11-23 21:10:59,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498016144] [2019-11-23 21:10:59,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009008160] [2019-11-23 21:10:59,629 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 [2019-11-23 21:10:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:59,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:59,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-11-23 21:11:00,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:00,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 21:11:00,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239599499] [2019-11-23 21:11:00,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:11:00,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:11:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:11:00,090 INFO L87 Difference]: Start difference. First operand 33048 states and 36761 transitions. Second operand 3 states. [2019-11-23 21:11:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:04,068 INFO L93 Difference]: Finished difference Result 72102 states and 80460 transitions. [2019-11-23 21:11:04,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:04,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 417 [2019-11-23 21:11:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:04,128 INFO L225 Difference]: With dead ends: 72102 [2019-11-23 21:11:04,128 INFO L226 Difference]: Without dead ends: 39807 [2019-11-23 21:11:04,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:11:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39807 states. [2019-11-23 21:11:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 39807. [2019-11-23 21:11:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39807 states. [2019-11-23 21:11:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 43844 transitions. [2019-11-23 21:11:05,608 INFO L78 Accepts]: Start accepts. Automaton has 39807 states and 43844 transitions. Word has length 417 [2019-11-23 21:11:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:05,610 INFO L462 AbstractCegarLoop]: Abstraction has 39807 states and 43844 transitions. [2019-11-23 21:11:05,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 39807 states and 43844 transitions. [2019-11-23 21:11:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-11-23 21:11:05,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:05,629 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:05,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:05,843 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1547621376, now seen corresponding path program 1 times [2019-11-23 21:11:05,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:05,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087194971] [2019-11-23 21:11:05,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 21:11:06,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087194971] [2019-11-23 21:11:06,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:06,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:11:06,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829396562] [2019-11-23 21:11:06,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:11:06,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:11:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:11:06,224 INFO L87 Difference]: Start difference. First operand 39807 states and 43844 transitions. Second operand 4 states. [2019-11-23 21:11:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:12,439 INFO L93 Difference]: Finished difference Result 87873 states and 97129 transitions. [2019-11-23 21:11:12,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:11:12,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 424 [2019-11-23 21:11:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:12,492 INFO L225 Difference]: With dead ends: 87873 [2019-11-23 21:11:12,492 INFO L226 Difference]: Without dead ends: 48819 [2019-11-23 21:11:12,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 6 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 21:11:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48819 states. [2019-11-23 21:11:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 48819. [2019-11-23 21:11:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48819 states. [2019-11-23 21:11:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 52203 transitions. [2019-11-23 21:11:12,858 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 52203 transitions. Word has length 424 [2019-11-23 21:11:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:12,859 INFO L462 AbstractCegarLoop]: Abstraction has 48819 states and 52203 transitions. [2019-11-23 21:11:12,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:11:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 52203 transitions. [2019-11-23 21:11:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2019-11-23 21:11:12,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:12,876 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:11:12,877 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash -27357711, now seen corresponding path program 1 times [2019-11-23 21:11:12,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:12,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67205786] [2019-11-23 21:11:12,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY