/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/Problem18_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:23:03,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:23:03,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:23:03,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:23:03,393 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 21:23:03,428 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:23:03,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:23:03,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:23:03,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:23:03,430 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:23:03,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:23:03,432 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:23:03,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:23:03,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:23:03,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:23:03,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:23:03,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:23:03,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:23:03,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:23:03,434 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:23:03,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:23:03,434 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:23:03,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:23:03,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:23:03,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:23:03,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:23:03,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:23:03,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:23:03,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:23:03,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:23:03,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:23:03,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:23:03,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:23:03,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:23:03,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:23:03,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:23:03,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:23:03,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:23:03,731 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:23:03,731 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:23:03,732 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-11-23 21:23:03,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6afb2566/ba3d439cc8dc4f2da25f72a23796c406/FLAG28458509a [2019-11-23 21:23:04,509 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:23:04,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-11-23 21:23:04,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6afb2566/ba3d439cc8dc4f2da25f72a23796c406/FLAG28458509a [2019-11-23 21:23:04,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6afb2566/ba3d439cc8dc4f2da25f72a23796c406 [2019-11-23 21:23:04,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:23:04,610 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:23:04,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:04,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:23:04,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:23:04,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b39efa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04, skipping insertion in model container [2019-11-23 21:23:04,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:23:04,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:23:06,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:06,082 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:23:06,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:06,602 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:23:06,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06 WrapperNode [2019-11-23 21:23:06,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:06,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:06,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:23:06,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:23:06,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:06,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:23:06,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:23:06,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:23:06,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:06,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:07,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:07,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:07,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (1/1) ... [2019-11-23 21:23:07,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:23:07,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:23:07,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:23:07,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:23:07,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (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 21:23:07,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:23:07,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:11,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:11,108 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:11,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:11 BoogieIcfgContainer [2019-11-23 21:23:11,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:11,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:11,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:11,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:11,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:04" (1/3) ... [2019-11-23 21:23:11,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce438b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:11, skipping insertion in model container [2019-11-23 21:23:11,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:06" (2/3) ... [2019-11-23 21:23:11,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce438b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:11, skipping insertion in model container [2019-11-23 21:23:11,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:11" (3/3) ... [2019-11-23 21:23:11,120 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label27.c [2019-11-23 21:23:11,130 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:11,139 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:11,151 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:11,185 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:11,186 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:11,186 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:11,186 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:11,186 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:11,186 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:11,186 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:11,186 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 21:23:11,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:11,226 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] [2019-11-23 21:23:11,227 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1722039382, now seen corresponding path program 1 times [2019-11-23 21:23:11,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:11,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162846494] [2019-11-23 21:23:11,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:11,549 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 21:23:11,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162846494] [2019-11-23 21:23:11,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:11,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:11,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443449046] [2019-11-23 21:23:11,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:11,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:11,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:11,577 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:19,254 INFO L93 Difference]: Finished difference Result 2910 states and 5661 transitions. [2019-11-23 21:23:19,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:23:19,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-23 21:23:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:19,313 INFO L225 Difference]: With dead ends: 2910 [2019-11-23 21:23:19,313 INFO L226 Difference]: Without dead ends: 2080 [2019-11-23 21:23:19,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2019-11-23 21:23:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2074. [2019-11-23 21:23:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2019-11-23 21:23:19,539 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 30 [2019-11-23 21:23:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:19,540 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2019-11-23 21:23:19,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2019-11-23 21:23:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-23 21:23:19,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:19,566 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:19,567 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1183799445, now seen corresponding path program 1 times [2019-11-23 21:23:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:19,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122397289] [2019-11-23 21:23:19,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 21:23:20,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122397289] [2019-11-23 21:23:20,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:20,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:20,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136274768] [2019-11-23 21:23:20,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:20,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:20,223 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand 5 states. [2019-11-23 21:23:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:26,795 INFO L93 Difference]: Finished difference Result 6216 states and 9564 transitions. [2019-11-23 21:23:26,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:26,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2019-11-23 21:23:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:26,818 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:23:26,818 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:23:26,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:23:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:23:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:23:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5440 transitions. [2019-11-23 21:23:26,898 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5440 transitions. Word has length 190 [2019-11-23 21:23:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:26,900 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5440 transitions. [2019-11-23 21:23:26,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5440 transitions. [2019-11-23 21:23:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-11-23 21:23:26,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:26,909 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:26,909 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:26,910 INFO L82 PathProgramCache]: Analyzing trace with hash 126816654, now seen corresponding path program 1 times [2019-11-23 21:23:26,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:26,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088844760] [2019-11-23 21:23:26,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:23:27,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088844760] [2019-11-23 21:23:27,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20729078] [2019-11-23 21:23:27,208 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 21:23:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:27,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:27,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:27,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:27,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:23:27,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390165793] [2019-11-23 21:23:27,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:27,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:27,523 INFO L87 Difference]: Start difference. First operand 4144 states and 5440 transitions. Second operand 3 states. [2019-11-23 21:23:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:31,463 INFO L93 Difference]: Finished difference Result 9666 states and 13519 transitions. [2019-11-23 21:23:31,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:31,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 279 [2019-11-23 21:23:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:31,492 INFO L225 Difference]: With dead ends: 9666 [2019-11-23 21:23:31,492 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:31,497 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 279 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 21:23:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:23:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:23:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 7930 transitions. [2019-11-23 21:23:31,602 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 7930 transitions. Word has length 279 [2019-11-23 21:23:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:31,603 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 7930 transitions. [2019-11-23 21:23:31,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 7930 transitions. [2019-11-23 21:23:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-11-23 21:23:31,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:31,608 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:31,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:31,813 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash -831376738, now seen corresponding path program 1 times [2019-11-23 21:23:31,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:31,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242940040] [2019-11-23 21:23:31,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 141 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:32,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242940040] [2019-11-23 21:23:32,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167099010] [2019-11-23 21:23:32,261 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 21:23:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:32,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:32,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-23 21:23:32,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:32,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2019-11-23 21:23:32,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459701439] [2019-11-23 21:23:32,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:32,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:32,510 INFO L87 Difference]: Start difference. First operand 6214 states and 7930 transitions. Second operand 3 states. [2019-11-23 21:23:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:36,283 INFO L93 Difference]: Finished difference Result 15186 states and 20095 transitions. [2019-11-23 21:23:36,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:36,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 302 [2019-11-23 21:23:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:36,324 INFO L225 Difference]: With dead ends: 15186 [2019-11-23 21:23:36,324 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:23:36,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:23:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:23:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:23:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10979 transitions. [2019-11-23 21:23:36,501 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10979 transitions. Word has length 302 [2019-11-23 21:23:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:36,502 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10979 transitions. [2019-11-23 21:23:36,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10979 transitions. [2019-11-23 21:23:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-11-23 21:23:36,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:36,514 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:36,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:36,727 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1346203205, now seen corresponding path program 1 times [2019-11-23 21:23:36,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:36,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852157224] [2019-11-23 21:23:36,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 309 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 21:23:37,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852157224] [2019-11-23 21:23:37,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280321557] [2019-11-23 21:23:37,175 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 21:23:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:37,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:37,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:23:37,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:37,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:37,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639301529] [2019-11-23 21:23:37,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:37,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:37,408 INFO L87 Difference]: Start difference. First operand 8974 states and 10979 transitions. Second operand 3 states. [2019-11-23 21:23:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:41,560 INFO L93 Difference]: Finished difference Result 24846 states and 30838 transitions. [2019-11-23 21:23:41,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:41,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 420 [2019-11-23 21:23:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:41,628 INFO L225 Difference]: With dead ends: 24846 [2019-11-23 21:23:41,628 INFO L226 Difference]: Without dead ends: 16564 [2019-11-23 21:23:41,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 419 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2019-11-23 21:23:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 15184. [2019-11-23 21:23:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15184 states. [2019-11-23 21:23:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 18695 transitions. [2019-11-23 21:23:41,890 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 18695 transitions. Word has length 420 [2019-11-23 21:23:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:41,891 INFO L462 AbstractCegarLoop]: Abstraction has 15184 states and 18695 transitions. [2019-11-23 21:23:41,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 18695 transitions. [2019-11-23 21:23:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2019-11-23 21:23:41,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:41,908 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:42,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:42,121 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1449973018, now seen corresponding path program 1 times [2019-11-23 21:23:42,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:42,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681159870] [2019-11-23 21:23:42,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 419 proven. 3 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 21:23:42,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681159870] [2019-11-23 21:23:42,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070235394] [2019-11-23 21:23:42,944 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 21:23:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:43,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:43,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 21:23:43,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:43,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:43,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806105768] [2019-11-23 21:23:43,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:43,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:43,307 INFO L87 Difference]: Start difference. First operand 15184 states and 18695 transitions. Second operand 3 states. [2019-11-23 21:23:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:47,300 INFO L93 Difference]: Finished difference Result 36576 states and 46509 transitions. [2019-11-23 21:23:47,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:47,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2019-11-23 21:23:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:47,338 INFO L225 Difference]: With dead ends: 36576 [2019-11-23 21:23:47,347 INFO L226 Difference]: Without dead ends: 22084 [2019-11-23 21:23:47,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 479 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2019-11-23 21:23:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 22084. [2019-11-23 21:23:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22084 states. [2019-11-23 21:23:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 27570 transitions. [2019-11-23 21:23:48,438 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 27570 transitions. Word has length 480 [2019-11-23 21:23:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:48,439 INFO L462 AbstractCegarLoop]: Abstraction has 22084 states and 27570 transitions. [2019-11-23 21:23:48,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 27570 transitions. [2019-11-23 21:23:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2019-11-23 21:23:48,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:48,446 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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 21:23:48,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:48,653 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1154428976, now seen corresponding path program 1 times [2019-11-23 21:23:48,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:48,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085405526] [2019-11-23 21:23:48,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 487 proven. 3 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-23 21:23:49,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085405526] [2019-11-23 21:23:49,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060626858] [2019-11-23 21:23:49,389 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 21:23:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:49,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:49,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2019-11-23 21:23:49,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:49,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:49,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163487765] [2019-11-23 21:23:49,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:49,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:49,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:49,862 INFO L87 Difference]: Start difference. First operand 22084 states and 27570 transitions. Second operand 3 states. [2019-11-23 21:23:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:54,039 INFO L93 Difference]: Finished difference Result 43476 states and 54442 transitions. [2019-11-23 21:23:54,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:54,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 548 [2019-11-23 21:23:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:54,075 INFO L225 Difference]: With dead ends: 43476 [2019-11-23 21:23:54,075 INFO L226 Difference]: Without dead ends: 22084 [2019-11-23 21:23:54,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 547 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2019-11-23 21:23:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 21394. [2019-11-23 21:23:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21394 states. [2019-11-23 21:23:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21394 states to 21394 states and 24851 transitions. [2019-11-23 21:23:54,371 INFO L78 Accepts]: Start accepts. Automaton has 21394 states and 24851 transitions. Word has length 548 [2019-11-23 21:23:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:54,372 INFO L462 AbstractCegarLoop]: Abstraction has 21394 states and 24851 transitions. [2019-11-23 21:23:54,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 21394 states and 24851 transitions. [2019-11-23 21:23:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2019-11-23 21:23:54,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:54,386 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:54,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:54,600 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -968624952, now seen corresponding path program 1 times [2019-11-23 21:23:54,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:54,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663969319] [2019-11-23 21:23:54,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 517 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 21:23:55,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663969319] [2019-11-23 21:23:55,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372215528] [2019-11-23 21:23:55,470 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 21:23:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:55,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:55,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-11-23 21:23:55,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:55,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:55,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617741864] [2019-11-23 21:23:55,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:55,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:55,766 INFO L87 Difference]: Start difference. First operand 21394 states and 24851 transitions. Second operand 3 states. [2019-11-23 21:24:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:00,272 INFO L93 Difference]: Finished difference Result 51756 states and 60508 transitions. [2019-11-23 21:24:00,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:00,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 578 [2019-11-23 21:24:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:00,308 INFO L225 Difference]: With dead ends: 51756 [2019-11-23 21:24:00,308 INFO L226 Difference]: Without dead ends: 31054 [2019-11-23 21:24:00,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 577 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31054 states. [2019-11-23 21:24:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31054 to 29674. [2019-11-23 21:24:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29674 states. [2019-11-23 21:24:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29674 states to 29674 states and 33863 transitions. [2019-11-23 21:24:00,687 INFO L78 Accepts]: Start accepts. Automaton has 29674 states and 33863 transitions. Word has length 578 [2019-11-23 21:24:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:00,689 INFO L462 AbstractCegarLoop]: Abstraction has 29674 states and 33863 transitions. [2019-11-23 21:24:00,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29674 states and 33863 transitions. [2019-11-23 21:24:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2019-11-23 21:24:00,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:00,703 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-11-23 21:24:00,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:00,910 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1829748560, now seen corresponding path program 1 times [2019-11-23 21:24:00,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:00,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603521177] [2019-11-23 21:24:00,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 541 proven. 3 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-23 21:24:01,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603521177] [2019-11-23 21:24:01,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765003733] [2019-11-23 21:24:01,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:01,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:01,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 21:24:01,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:01,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:01,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683429944] [2019-11-23 21:24:01,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:01,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:01,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:01,990 INFO L87 Difference]: Start difference. First operand 29674 states and 33863 transitions. Second operand 3 states. [2019-11-23 21:24:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:05,851 INFO L93 Difference]: Finished difference Result 59346 states and 67730 transitions. [2019-11-23 21:24:05,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:05,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 626 [2019-11-23 21:24:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:05,886 INFO L225 Difference]: With dead ends: 59346 [2019-11-23 21:24:05,886 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:24:05,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 625 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:24:06,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 28294. [2019-11-23 21:24:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28294 states. [2019-11-23 21:24:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28294 states to 28294 states and 32261 transitions. [2019-11-23 21:24:06,238 INFO L78 Accepts]: Start accepts. Automaton has 28294 states and 32261 transitions. Word has length 626 [2019-11-23 21:24:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:06,239 INFO L462 AbstractCegarLoop]: Abstraction has 28294 states and 32261 transitions. [2019-11-23 21:24:06,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28294 states and 32261 transitions. [2019-11-23 21:24:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2019-11-23 21:24:06,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:06,256 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:06,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:06,461 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:06,462 INFO L82 PathProgramCache]: Analyzing trace with hash 668272354, now seen corresponding path program 1 times [2019-11-23 21:24:06,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:06,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921246423] [2019-11-23 21:24:06,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 711 proven. 3 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-23 21:24:07,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921246423] [2019-11-23 21:24:07,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708966034] [2019-11-23 21:24:07,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:07,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:07,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 877 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2019-11-23 21:24:07,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:07,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:07,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660527868] [2019-11-23 21:24:07,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:07,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:07,641 INFO L87 Difference]: Start difference. First operand 28294 states and 32261 transitions. Second operand 3 states. [2019-11-23 21:24:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:11,453 INFO L93 Difference]: Finished difference Result 62106 states and 71090 transitions. [2019-11-23 21:24:11,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:11,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 672 [2019-11-23 21:24:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:11,485 INFO L225 Difference]: With dead ends: 62106 [2019-11-23 21:24:11,485 INFO L226 Difference]: Without dead ends: 34504 [2019-11-23 21:24:11,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 671 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34504 states. [2019-11-23 21:24:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34504 to 34504. [2019-11-23 21:24:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34504 states. [2019-11-23 21:24:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 38855 transitions. [2019-11-23 21:24:11,815 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 38855 transitions. Word has length 672 [2019-11-23 21:24:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:11,815 INFO L462 AbstractCegarLoop]: Abstraction has 34504 states and 38855 transitions. [2019-11-23 21:24:11,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 38855 transitions. [2019-11-23 21:24:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2019-11-23 21:24:11,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:11,836 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:12,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:12,040 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2002417359, now seen corresponding path program 1 times [2019-11-23 21:24:12,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:12,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790848154] [2019-11-23 21:24:12,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 541 proven. 3 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-23 21:24:13,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790848154] [2019-11-23 21:24:13,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354253726] [2019-11-23 21:24:13,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:13,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:13,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 21:24:13,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:13,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:13,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173398672] [2019-11-23 21:24:13,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:13,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:13,956 INFO L87 Difference]: Start difference. First operand 34504 states and 38855 transitions. Second operand 3 states. [2019-11-23 21:24:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:18,110 INFO L93 Difference]: Finished difference Result 77976 states and 88172 transitions. [2019-11-23 21:24:18,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:18,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 693 [2019-11-23 21:24:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:18,146 INFO L225 Difference]: With dead ends: 77976 [2019-11-23 21:24:18,146 INFO L226 Difference]: Without dead ends: 44164 [2019-11-23 21:24:18,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 692 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44164 states. [2019-11-23 21:24:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44164 to 42784. [2019-11-23 21:24:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42784 states. [2019-11-23 21:24:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 47891 transitions. [2019-11-23 21:24:18,673 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 47891 transitions. Word has length 693 [2019-11-23 21:24:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:18,673 INFO L462 AbstractCegarLoop]: Abstraction has 42784 states and 47891 transitions. [2019-11-23 21:24:18,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 47891 transitions. [2019-11-23 21:24:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2019-11-23 21:24:18,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:18,698 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:18,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:18,902 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1480012419, now seen corresponding path program 1 times [2019-11-23 21:24:18,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:18,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146349719] [2019-11-23 21:24:18,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 685 proven. 3 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-23 21:24:19,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146349719] [2019-11-23 21:24:19,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561225284] [2019-11-23 21:24:19,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:19,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:19,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-23 21:24:19,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:19,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:19,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473667649] [2019-11-23 21:24:19,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:19,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:19,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:19,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:19,996 INFO L87 Difference]: Start difference. First operand 42784 states and 47891 transitions. Second operand 3 states. [2019-11-23 21:24:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:23,634 INFO L93 Difference]: Finished difference Result 94536 states and 106124 transitions. [2019-11-23 21:24:23,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:23,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 716 [2019-11-23 21:24:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:23,670 INFO L225 Difference]: With dead ends: 94536 [2019-11-23 21:24:23,670 INFO L226 Difference]: Without dead ends: 47614 [2019-11-23 21:24:23,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47614 states. [2019-11-23 21:24:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47614 to 46234. [2019-11-23 21:24:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46234 states.