/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:44:31,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:44:31,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:44:31,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:44:31,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:44:31,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:44:31,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:44:31,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:44:31,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:44:31,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:44:31,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:44:31,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:44:31,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:44:31,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:44:31,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:44:31,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:44:31,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:44:31,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:44:31,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:44:31,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:44:31,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:44:31,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:44:31,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:44:31,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:44:31,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:44:31,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:44:31,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:44:31,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:44:31,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:44:31,675 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:44:31,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:44:31,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:44:31,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:44:31,677 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:44:31,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:44:31,678 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:44:31,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:44:31,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:44:31,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:44:31,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:44:31,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:44:31,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:44:31,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:44:31,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:44:31,679 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:44:31,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:44:31,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:44:31,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:44:31,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:44:31,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:44:31,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:44:31,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:44:31,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:44:31,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:44:31,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:44:31,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:44:31,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:44:31,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:44:31,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:44:31,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:44:31,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:44:31,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:44:31,997 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:44:31,998 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-06 18:44:32,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a3de50d/8aea83ca761c40578936dc1978e93976/FLAG000ea9fb6 [2019-11-06 18:44:32,534 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:44:32,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-06 18:44:32,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a3de50d/8aea83ca761c40578936dc1978e93976/FLAG000ea9fb6 [2019-11-06 18:44:32,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a3de50d/8aea83ca761c40578936dc1978e93976 [2019-11-06 18:44:32,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:44:32,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:44:32,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:32,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:44:32,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:44:32,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6afdfcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32, skipping insertion in model container [2019-11-06 18:44:32,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,945 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:44:32,963 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:44:33,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:33,143 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:44:33,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:33,188 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:44:33,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33 WrapperNode [2019-11-06 18:44:33,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:33,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:44:33,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:44:33,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:44:33,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... [2019-11-06 18:44:33,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:44:33,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:44:33,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:44:33,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:44:33,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:44:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:44:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:44:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:44:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:44:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:44:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:44:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:44:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:44:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:44:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:44:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:44:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:44:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:44:33,676 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:44:33,677 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-06 18:44:33,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:33 BoogieIcfgContainer [2019-11-06 18:44:33,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:44:33,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:44:33,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:44:33,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:44:33,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:44:32" (1/3) ... [2019-11-06 18:44:33,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44180ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:44:33, skipping insertion in model container [2019-11-06 18:44:33,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:33" (2/3) ... [2019-11-06 18:44:33,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44180ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:44:33, skipping insertion in model container [2019-11-06 18:44:33,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:33" (3/3) ... [2019-11-06 18:44:33,696 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-11-06 18:44:33,724 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:44:33,734 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:44:33,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:44:33,771 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:44:33,771 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:44:33,771 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:44:33,771 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:44:33,772 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:44:33,772 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:44:33,772 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:44:33,772 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:44:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-06 18:44:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:44:33,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:33,795 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] [2019-11-06 18:44:33,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2019-11-06 18:44:33,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:33,813 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691882666] [2019-11-06 18:44:33,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:33,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691882666] [2019-11-06 18:44:33,994 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:33,994 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:44:33,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081308927] [2019-11-06 18:44:34,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:44:34,002 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:34,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:44:34,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:44:34,021 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-06 18:44:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:34,152 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2019-11-06 18:44:34,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:44:34,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-06 18:44:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:34,164 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:44:34,164 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:44:34,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:44:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:44:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:44:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:44:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-06 18:44:34,205 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2019-11-06 18:44:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:34,206 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-06 18:44:34,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:44:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-06 18:44:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:44:34,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:34,208 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] [2019-11-06 18:44:34,208 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2019-11-06 18:44:34,209 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:34,209 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515018181] [2019-11-06 18:44:34,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:34,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515018181] [2019-11-06 18:44:34,294 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:34,294 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:44:34,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624296178] [2019-11-06 18:44:34,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:44:34,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:44:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:44:34,301 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-06 18:44:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:34,424 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-11-06 18:44:34,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:44:34,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:44:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:34,426 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:44:34,427 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:44:34,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:44:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:44:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:44:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:44:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:44:34,438 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-11-06 18:44:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:34,438 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:44:34,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:44:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:44:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:44:34,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:34,440 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] [2019-11-06 18:44:34,440 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2019-11-06 18:44:34,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:34,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393444051] [2019-11-06 18:44:34,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:44:34,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393444051] [2019-11-06 18:44:34,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124182786] [2019-11-06 18:44:34,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:44:34,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:44:34,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:34,685 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:44:34,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178263847] [2019-11-06 18:44:34,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:44:34,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:44:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:44:34,687 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-11-06 18:44:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:34,845 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-11-06 18:44:34,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:44:34,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-06 18:44:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:34,846 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:44:34,846 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:44:34,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:44:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:44:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:44:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:44:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-06 18:44:34,861 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2019-11-06 18:44:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:34,863 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-06 18:44:34,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:44:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-06 18:44:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:44:34,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:34,864 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:44:35,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:35,070 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2019-11-06 18:44:35,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:35,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520870610] [2019-11-06 18:44:35,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:44:35,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520870610] [2019-11-06 18:44:35,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267868669] [2019-11-06 18:44:35,213 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:35,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:35,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:35,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:44:35,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:44:35,292 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:35,293 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:44:35,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929343371] [2019-11-06 18:44:35,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:44:35,294 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:44:35,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:44:35,295 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2019-11-06 18:44:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:35,430 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-11-06 18:44:35,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:44:35,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-06 18:44:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:35,432 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:44:35,432 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:44:35,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:44:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:44:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:44:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:44:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-06 18:44:35,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2019-11-06 18:44:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:35,449 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-06 18:44:35,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:44:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-06 18:44:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:44:35,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:35,452 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:35,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:35,658 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2019-11-06 18:44:35,661 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:35,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668543023] [2019-11-06 18:44:35,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:44:35,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668543023] [2019-11-06 18:44:35,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548196201] [2019-11-06 18:44:35,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:35,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:44:35,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:35,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:44:35,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:44:35,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:35,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:44:35,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102257755] [2019-11-06 18:44:35,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:44:35,934 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:44:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:44:35,935 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 8 states. [2019-11-06 18:44:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:36,093 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2019-11-06 18:44:36,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:44:36,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-11-06 18:44:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:36,094 INFO L225 Difference]: With dead ends: 88 [2019-11-06 18:44:36,094 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:44:36,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:44:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:44:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:44:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:44:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-11-06 18:44:36,111 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2019-11-06 18:44:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:36,111 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-11-06 18:44:36,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:44:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-11-06 18:44:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:44:36,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:36,116 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:36,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:36,322 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2019-11-06 18:44:36,323 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:36,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491974960] [2019-11-06 18:44:36,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:44:36,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491974960] [2019-11-06 18:44:36,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252785221] [2019-11-06 18:44:36,454 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:36,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:36,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:36,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:44:36,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:44:36,545 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:36,545 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:44:36,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829287844] [2019-11-06 18:44:36,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:44:36,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:44:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:44:36,551 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 9 states. [2019-11-06 18:44:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:36,714 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-11-06 18:44:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:44:36,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-06 18:44:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:36,716 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:44:36,716 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:44:36,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:44:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:44:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-06 18:44:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:44:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-11-06 18:44:36,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2019-11-06 18:44:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:36,725 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-11-06 18:44:36,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:44:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-11-06 18:44:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:44:36,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:36,726 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:36,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:36,938 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2019-11-06 18:44:36,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:36,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885486091] [2019-11-06 18:44:36,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 18:44:37,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885486091] [2019-11-06 18:44:37,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538683964] [2019-11-06 18:44:37,113 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:43,039 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:44:43,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:43,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:44:43,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 18:44:43,079 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:43,080 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:44:43,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875903470] [2019-11-06 18:44:43,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:44:43,081 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:44:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:44:43,082 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 10 states. [2019-11-06 18:44:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:43,230 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2019-11-06 18:44:43,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:44:43,231 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-11-06 18:44:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:43,234 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:44:43,235 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:44:43,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:44:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:44:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-06 18:44:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:44:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-11-06 18:44:43,251 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2019-11-06 18:44:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:43,252 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-11-06 18:44:43,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:44:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-11-06 18:44:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:44:43,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:43,255 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:43,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:43,456 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2019-11-06 18:44:43,457 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:43,457 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38112107] [2019-11-06 18:44:43,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 18:44:43,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38112107] [2019-11-06 18:44:43,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17583121] [2019-11-06 18:44:43,577 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:44,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:44:44,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:44,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:44:44,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 18:44:44,131 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:44,131 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:44:44,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433886961] [2019-11-06 18:44:44,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:44:44,132 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:44,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:44:44,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:44:44,135 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 11 states. [2019-11-06 18:44:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:44,285 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-11-06 18:44:44,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:44:44,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-11-06 18:44:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:44,286 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:44:44,287 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 18:44:44,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:44:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 18:44:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-06 18:44:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:44:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-06 18:44:44,305 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2019-11-06 18:44:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:44,305 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-06 18:44:44,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:44:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-06 18:44:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:44:44,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:44,306 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:44,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:44,519 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2019-11-06 18:44:44,520 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:44,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329479043] [2019-11-06 18:44:44,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-06 18:44:44,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329479043] [2019-11-06 18:44:44,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524606756] [2019-11-06 18:44:44,709 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:44,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:44:44,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-06 18:44:44,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:44,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:44:44,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638973229] [2019-11-06 18:44:44,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:44:44,817 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:44,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:44:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:44:44,821 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 12 states. [2019-11-06 18:44:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:44,977 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-11-06 18:44:44,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:44:44,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-06 18:44:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:44,979 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:44:44,979 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 18:44:44,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:44:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 18:44:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-06 18:44:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:44:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-11-06 18:44:44,989 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2019-11-06 18:44:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:44,990 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-11-06 18:44:44,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:44:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-11-06 18:44:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:44:44,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:44,991 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:45,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:45,198 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2019-11-06 18:44:45,199 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:45,199 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447576225] [2019-11-06 18:44:45,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 18:44:45,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447576225] [2019-11-06 18:44:45,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953153722] [2019-11-06 18:44:45,345 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:44:45,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:45,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:45,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:44:45,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 18:44:45,445 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:45,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:44:45,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995537707] [2019-11-06 18:44:45,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:44:45,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:44:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:44:45,447 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 13 states. [2019-11-06 18:44:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:45,622 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2019-11-06 18:44:45,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:44:45,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-11-06 18:44:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:45,624 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:44:45,624 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:44:45,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:44:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:44:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-11-06 18:44:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:44:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-11-06 18:44:45,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2019-11-06 18:44:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:45,635 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-11-06 18:44:45,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:44:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-11-06 18:44:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:44:45,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:45,636 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:45,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:45,839 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2019-11-06 18:44:45,840 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:45,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794140469] [2019-11-06 18:44:45,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-06 18:44:45,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794140469] [2019-11-06 18:44:45,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210060025] [2019-11-06 18:44:45,983 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:44:51,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:44:51,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:51,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:44:51,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-06 18:44:51,090 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:51,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-06 18:44:51,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614434011] [2019-11-06 18:44:51,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:44:51,091 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:44:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:51,092 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 15 states. [2019-11-06 18:44:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:51,298 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2019-11-06 18:44:51,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:44:51,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2019-11-06 18:44:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:51,299 INFO L225 Difference]: With dead ends: 154 [2019-11-06 18:44:51,300 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:44:51,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:44:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-06 18:44:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:44:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2019-11-06 18:44:51,309 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2019-11-06 18:44:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:51,309 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2019-11-06 18:44:51,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:44:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2019-11-06 18:44:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:44:51,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:51,310 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:51,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:51,516 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2019-11-06 18:44:51,517 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:51,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767621604] [2019-11-06 18:44:51,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-06 18:44:51,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767621604] [2019-11-06 18:44:51,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542144865] [2019-11-06 18:44:51,699 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:44:51,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:51,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:51,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:44:51,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-06 18:44:51,808 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:51,808 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:44:51,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471891385] [2019-11-06 18:44:51,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:44:51,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:44:51,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:51,810 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 15 states. [2019-11-06 18:44:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:52,006 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-11-06 18:44:52,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:44:52,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2019-11-06 18:44:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:52,008 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:44:52,008 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:44:52,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:44:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-11-06 18:44:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-06 18:44:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-11-06 18:44:52,017 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2019-11-06 18:44:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:52,017 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-11-06 18:44:52,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:44:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-11-06 18:44:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:44:52,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:52,019 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:52,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:52,223 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2019-11-06 18:44:52,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:52,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912661511] [2019-11-06 18:44:52,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-06 18:44:52,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912661511] [2019-11-06 18:44:52,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581794278] [2019-11-06 18:44:52,376 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true