/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:44:31,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:44:31,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:44:31,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:44:31,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:44:31,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:44:31,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:44:31,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:44:31,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:44:31,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:44:31,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:44:31,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:44:31,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:44:31,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:44:31,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:44:31,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:44:31,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:44:31,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:44:31,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:44:31,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:44:31,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:44:31,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:44:31,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:44:31,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:44:31,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:44:31,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:44:31,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:44:31,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:44:31,106 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 18:44:31,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:44:31,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:44:31,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:44:31,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:44:31,124 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:44:31,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:44:31,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:44:31,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:44:31,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:44:31,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:44:31,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:44:31,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:44:31,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:44:31,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:44:31,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:44:31,126 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:44:31,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:44:31,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:44:31,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:44:31,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:44:31,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:44:31,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:44:31,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:44:31,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:44:31,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:44:31,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:44:31,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:44:31,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:44:31,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:44:31,444 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:44:31,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:44:31,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:44:31,467 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:44:31,468 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:44:31,468 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-11-06 18:44:31,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7dea055/238e64a462d3441cb9007be317afe155/FLAG4141009a3 [2019-11-06 18:44:31,977 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:44:31,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-11-06 18:44:31,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7dea055/238e64a462d3441cb9007be317afe155/FLAG4141009a3 [2019-11-06 18:44:32,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7dea055/238e64a462d3441cb9007be317afe155 [2019-11-06 18:44:32,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:44:32,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:44:32,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:32,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:44:32,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:44:32,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d89586 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 18:44:32,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,389 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:44:32,408 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:44:32,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:32,674 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:44:32,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:32,825 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:44:32,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32 WrapperNode [2019-11-06 18:44:32,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:32,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:44:32,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:44:32,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:44:32,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (1/1) ... [2019-11-06 18:44:32,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:44:32,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:44:32,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:44:32,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:44:32,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (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 18:44:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:44:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:44:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:44:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:44:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:44:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:44:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:44:33,259 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:44:33,259 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-06 18:44:33,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:33 BoogieIcfgContainer [2019-11-06 18:44:33,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:44:33,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:44:33,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:44:33,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:44:33,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:44:32" (1/3) ... [2019-11-06 18:44:33,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9e1acd 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 18:44:33,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:32" (2/3) ... [2019-11-06 18:44:33,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9e1acd 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 18:44:33,272 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 18:44:33,274 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2019-11-06 18:44:33,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:44:33,297 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:44:33,309 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:44:33,344 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:44:33,344 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:44:33,344 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:44:33,345 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:44:33,345 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:44:33,345 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:44:33,345 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:44:33,345 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:44:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-06 18:44:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:44:33,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:33,367 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 18:44:33,369 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2019-11-06 18:44:33,384 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:33,384 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317192178] [2019-11-06 18:44:33,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:33,543 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 18:44:33,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317192178] [2019-11-06 18:44:33,544 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:33,545 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:44:33,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596359669] [2019-11-06 18:44:33,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:44:33,551 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:33,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:44:33,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:44:33,566 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-06 18:44:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:33,710 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2019-11-06 18:44:33,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:44:33,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-06 18:44:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:33,722 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:44:33,722 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:44:33,727 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 18:44:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:44:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:44:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:44:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-06 18:44:33,767 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2019-11-06 18:44:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:33,768 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-06 18:44:33,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:44:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-06 18:44:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:44:33,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:33,770 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 18:44:33,770 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2019-11-06 18:44:33,771 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:33,772 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003438028] [2019-11-06 18:44:33,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:33,862 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 18:44:33,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003438028] [2019-11-06 18:44:33,863 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:33,863 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:44:33,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169415528] [2019-11-06 18:44:33,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:44:33,866 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:44:33,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:44:33,867 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-06 18:44:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:34,005 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-11-06 18:44:34,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:44:34,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:44:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:34,007 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:44:34,007 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:44:34,008 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 18:44:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:44:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:44:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:44:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:44:34,018 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-11-06 18:44:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:34,018 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:44:34,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:44:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:44:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:44:34,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:34,020 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 18:44:34,020 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:34,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2019-11-06 18:44:34,021 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:34,021 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478625767] [2019-11-06 18:44:34,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,123 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 18:44:34,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478625767] [2019-11-06 18:44:34,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291248254] [2019-11-06 18:44:34,124 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 18:44:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:44:34,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:34,221 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 18:44:34,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:34,222 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:44:34,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315679412] [2019-11-06 18:44:34,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:44:34,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:44:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:44:34,224 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-11-06 18:44:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:34,407 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-11-06 18:44:34,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:44:34,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-06 18:44:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:34,409 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:44:34,409 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:44:34,410 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 18:44:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:44:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:44:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:44:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-06 18:44:34,418 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2019-11-06 18:44:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:34,418 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-06 18:44:34,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:44:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-06 18:44:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:44:34,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:34,420 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 18:44:34,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:34,625 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:34,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2019-11-06 18:44:34,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:34,626 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006430675] [2019-11-06 18:44:34,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:34,725 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 18:44:34,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006430675] [2019-11-06 18:44:34,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80413218] [2019-11-06 18:44:34,726 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 18:44:34,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:34,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:34,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:44:34,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:34,790 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 18:44:34,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:34,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:44:34,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838781472] [2019-11-06 18:44:34,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:44:34,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:34,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:44:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:44:34,792 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2019-11-06 18:44:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:34,944 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-11-06 18:44:34,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:44:34,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-06 18:44:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:34,946 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:44:34,946 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:44:34,948 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 18:44:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:44:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:44:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:44:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-06 18:44:34,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2019-11-06 18:44:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:34,967 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-06 18:44:34,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:44:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-06 18:44:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:44:34,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:34,972 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 18:44:35,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:35,176 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:35,176 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2019-11-06 18:44:35,177 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:35,177 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074297248] [2019-11-06 18:44:35,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,331 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 18:44:35,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074297248] [2019-11-06 18:44:35,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485535618] [2019-11-06 18:44:35,334 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 18:44:35,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:44:35,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:35,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:44:35,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:35,439 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 18:44:35,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:35,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:44:35,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17440839] [2019-11-06 18:44:35,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:44:35,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:44:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:44:35,444 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 8 states. [2019-11-06 18:44:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:35,599 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2019-11-06 18:44:35,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:44:35,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-11-06 18:44:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:35,600 INFO L225 Difference]: With dead ends: 88 [2019-11-06 18:44:35,600 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:44:35,601 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 18:44:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:44:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:44:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:44:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-11-06 18:44:35,609 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2019-11-06 18:44:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:35,609 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-11-06 18:44:35,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:44:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-11-06 18:44:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:44:35,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:35,611 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 18:44:35,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:35,815 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2019-11-06 18:44:35,817 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:35,817 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837790813] [2019-11-06 18:44:35,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:35,925 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 18:44:35,926 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837790813] [2019-11-06 18:44:35,926 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264653080] [2019-11-06 18:44:35,926 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 18:44:35,999 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:35,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:36,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:44:36,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:36,036 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 18:44:36,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:36,043 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:44:36,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212501585] [2019-11-06 18:44:36,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:44:36,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:44:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:44:36,047 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 9 states. [2019-11-06 18:44:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:36,229 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-11-06 18:44:36,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:44:36,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-06 18:44:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:36,231 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:44:36,231 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:44:36,232 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 18:44:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:44:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-06 18:44:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:44:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-11-06 18:44:36,240 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2019-11-06 18:44:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:36,240 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-11-06 18:44:36,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:44:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-11-06 18:44:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:44:36,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:36,242 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 18:44:36,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:36,446 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2019-11-06 18:44:36,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:36,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911981396] [2019-11-06 18:44:36,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:36,547 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 18:44:36,547 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911981396] [2019-11-06 18:44:36,548 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841641013] [2019-11-06 18:44:36,548 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 18:44:42,115 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:44:42,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:42,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:44:42,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:42,174 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 18:44:42,174 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:42,175 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:44:42,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809513311] [2019-11-06 18:44:42,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:44:42,176 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:44:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:44:42,176 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 10 states. [2019-11-06 18:44:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:42,323 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2019-11-06 18:44:42,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:44:42,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-11-06 18:44:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:42,325 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:44:42,325 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:44:42,326 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 18:44:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:44:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-06 18:44:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:44:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-11-06 18:44:42,349 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2019-11-06 18:44:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:42,349 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-11-06 18:44:42,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:44:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-11-06 18:44:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:44:42,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:42,354 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 18:44:42,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:42,566 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2019-11-06 18:44:42,567 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:42,567 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216231020] [2019-11-06 18:44:42,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:42,686 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 18:44:42,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216231020] [2019-11-06 18:44:42,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283434837] [2019-11-06 18:44:42,687 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 18:44:43,414 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:44:43,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:43,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:44:43,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:43,449 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 18:44:43,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:43,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:44:43,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769818275] [2019-11-06 18:44:43,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:44:43,451 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:44:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:44:43,452 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 11 states. [2019-11-06 18:44:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:43,620 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-11-06 18:44:43,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:44:43,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-11-06 18:44:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:43,622 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:44:43,622 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 18:44:43,624 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 18:44:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 18:44:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-06 18:44:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:44:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-06 18:44:43,632 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2019-11-06 18:44:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:43,633 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-06 18:44:43,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:44:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-06 18:44:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:44:43,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:43,634 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 18:44:43,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:43,848 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2019-11-06 18:44:43,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:43,849 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905597271] [2019-11-06 18:44:43,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:43,992 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 18:44:43,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905597271] [2019-11-06 18:44:43,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529262273] [2019-11-06 18:44:43,992 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 18:44:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:44,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:44:44,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:44,097 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 18:44:44,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:44,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:44:44,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427724950] [2019-11-06 18:44:44,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:44:44,099 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:44,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:44:44,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:44:44,099 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 12 states. [2019-11-06 18:44:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:44,312 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-11-06 18:44:44,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:44:44,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-06 18:44:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:44,314 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:44:44,314 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 18:44:44,314 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 18:44:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 18:44:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-06 18:44:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:44:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-11-06 18:44:44,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2019-11-06 18:44:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:44,322 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-11-06 18:44:44,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:44:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-11-06 18:44:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:44:44,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:44,324 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 18:44:44,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:44,528 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2019-11-06 18:44:44,529 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:44,529 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945486231] [2019-11-06 18:44:44,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:44,656 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 18:44:44,657 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945486231] [2019-11-06 18:44:44,657 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956540118] [2019-11-06 18:44:44,657 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 18:44:44,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:44,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:44,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:44:44,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:44,773 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 18:44:44,773 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:44,773 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:44:44,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466409881] [2019-11-06 18:44:44,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:44:44,774 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:44,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:44:44,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:44:44,775 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 13 states. [2019-11-06 18:44:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:44,918 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2019-11-06 18:44:44,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:44:44,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-11-06 18:44:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:44,919 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:44:44,919 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:44:44,920 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 18:44:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:44:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-11-06 18:44:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:44:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-11-06 18:44:44,929 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2019-11-06 18:44:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:44,929 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-11-06 18:44:44,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:44:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-11-06 18:44:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:44:44,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:44,930 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 18:44:45,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:45,136 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2019-11-06 18:44:45,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:45,137 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390701700] [2019-11-06 18:44:45,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:45,305 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 18:44:45,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390701700] [2019-11-06 18:44:45,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116142008] [2019-11-06 18:44:45,305 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 18:44:53,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:44:53,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:53,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:44:53,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:53,862 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 18:44:53,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:53,863 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:44:53,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114645757] [2019-11-06 18:44:53,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:44:53,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:53,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:44:53,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:44:53,864 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 14 states. [2019-11-06 18:44:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:54,061 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2019-11-06 18:44:54,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:44:54,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-11-06 18:44:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:54,062 INFO L225 Difference]: With dead ends: 154 [2019-11-06 18:44:54,062 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:44:54,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:44:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:44:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-06 18:44:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:44:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2019-11-06 18:44:54,071 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2019-11-06 18:44:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:54,072 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2019-11-06 18:44:54,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:44:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2019-11-06 18:44:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:44:54,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:54,073 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 18:44:54,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:54,284 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:54,285 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2019-11-06 18:44:54,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:54,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906270301] [2019-11-06 18:44:54,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:54,447 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 18:44:54,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906270301] [2019-11-06 18:44:54,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524723069] [2019-11-06 18:44:54,448 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 18:44:54,523 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:54,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:54,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:44:54,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:54,553 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 18:44:54,554 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:54,554 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:44:54,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680201894] [2019-11-06 18:44:54,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:44:54,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:44:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:54,556 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 15 states. [2019-11-06 18:44:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:54,800 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-11-06 18:44:54,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:44:54,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2019-11-06 18:44:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:54,801 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:44:54,802 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:44:54,803 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 18:44:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:44:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-11-06 18:44:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-06 18:44:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-11-06 18:44:54,821 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2019-11-06 18:44:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:54,822 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-11-06 18:44:54,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:44:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-11-06 18:44:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:44:54,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:54,825 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 18:44:55,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:55,027 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:55,027 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2019-11-06 18:44:55,028 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:55,028 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686090739] [2019-11-06 18:44:55,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:55,193 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 18:44:55,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686090739] [2019-11-06 18:44:55,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364911271] [2019-11-06 18:44:55,194 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