/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/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:09:10,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:09:10,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:09:10,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:09:10,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:09:10,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:09:10,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:09:10,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:09:10,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:09:10,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:09:10,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:09:10,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:09:10,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:09:10,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:09:10,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:09:10,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:09:10,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:09:10,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:09:10,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:09:10,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:09:10,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:09:10,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:09:10,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:09:10,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:09:10,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:09:10,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:09:10,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:09:10,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:09:10,157 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 22:09:10,171 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:09:10,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:09:10,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:09:10,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:09:10,173 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:09:10,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:09:10,174 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:09:10,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:09:10,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:09:10,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:09:10,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:09:10,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:09:10,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:09:10,175 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:09:10,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:09:10,175 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:09:10,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:09:10,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:09:10,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:09:10,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:09:10,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:09:10,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:09:10,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:09:10,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:09:10,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:09:10,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:09:10,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:09:10,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:09:10,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:09:10,458 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:09:10,473 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:09:10,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:09:10,479 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:09:10,479 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:09:10,480 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-11-06 22:09:10,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3db61e6/64802d36dedc46b59ffa360f80cc682a/FLAGe95ef43df [2019-11-06 22:09:11,095 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:09:11,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-11-06 22:09:11,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3db61e6/64802d36dedc46b59ffa360f80cc682a/FLAGe95ef43df [2019-11-06 22:09:11,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3db61e6/64802d36dedc46b59ffa360f80cc682a [2019-11-06 22:09:11,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:09:11,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:09:11,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:09:11,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:09:11,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:09:11,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:11,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13edb10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11, skipping insertion in model container [2019-11-06 22:09:11,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:11,421 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:09:11,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:09:11,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:09:11,751 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:09:11,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:09:11,985 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:09:11,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11 WrapperNode [2019-11-06 22:09:11,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:09:11,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:09:11,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:09:11,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:09:12,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (1/1) ... [2019-11-06 22:09:12,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:09:12,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:09:12,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:09:12,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:09:12,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (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 22:09:12,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:09:12,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:09:12,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:09:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:09:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:09:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:09:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:09:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:09:13,002 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:09:13,006 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 22:09:13,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:13 BoogieIcfgContainer [2019-11-06 22:09:13,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:09:13,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:09:13,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:09:13,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:09:13,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:09:11" (1/3) ... [2019-11-06 22:09:13,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfd7792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:13, skipping insertion in model container [2019-11-06 22:09:13,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:11" (2/3) ... [2019-11-06 22:09:13,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfd7792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:13, skipping insertion in model container [2019-11-06 22:09:13,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:13" (3/3) ... [2019-11-06 22:09:13,029 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2019-11-06 22:09:13,040 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:09:13,051 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:09:13,063 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:09:13,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:09:13,104 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:09:13,104 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:09:13,105 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:09:13,105 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:09:13,105 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:09:13,105 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:09:13,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:09:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2019-11-06 22:09:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 22:09:13,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:13,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:13,145 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:13,151 INFO L82 PathProgramCache]: Analyzing trace with hash 919157391, now seen corresponding path program 1 times [2019-11-06 22:09:13,161 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:13,161 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614406300] [2019-11-06 22:09:13,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:13,369 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 22:09:13,370 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614406300] [2019-11-06 22:09:13,371 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:13,372 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:13,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600201383] [2019-11-06 22:09:13,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:13,382 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:13,404 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2019-11-06 22:09:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:14,200 INFO L93 Difference]: Finished difference Result 331 states and 635 transitions. [2019-11-06 22:09:14,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:14,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-06 22:09:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:14,226 INFO L225 Difference]: With dead ends: 331 [2019-11-06 22:09:14,226 INFO L226 Difference]: Without dead ends: 206 [2019-11-06 22:09:14,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-06 22:09:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 182. [2019-11-06 22:09:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-06 22:09:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 314 transitions. [2019-11-06 22:09:14,310 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 314 transitions. Word has length 14 [2019-11-06 22:09:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:14,310 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 314 transitions. [2019-11-06 22:09:14,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 314 transitions. [2019-11-06 22:09:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 22:09:14,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:14,312 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:14,312 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash 736602936, now seen corresponding path program 1 times [2019-11-06 22:09:14,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:14,315 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106620269] [2019-11-06 22:09:14,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:14,413 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 22:09:14,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106620269] [2019-11-06 22:09:14,413 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:14,413 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:14,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159061157] [2019-11-06 22:09:14,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:14,415 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:14,416 INFO L87 Difference]: Start difference. First operand 182 states and 314 transitions. Second operand 4 states. [2019-11-06 22:09:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:14,828 INFO L93 Difference]: Finished difference Result 365 states and 632 transitions. [2019-11-06 22:09:14,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:14,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 22:09:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:14,833 INFO L225 Difference]: With dead ends: 365 [2019-11-06 22:09:14,833 INFO L226 Difference]: Without dead ends: 189 [2019-11-06 22:09:14,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-06 22:09:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2019-11-06 22:09:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-11-06 22:09:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 322 transitions. [2019-11-06 22:09:14,872 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 322 transitions. Word has length 15 [2019-11-06 22:09:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:14,873 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 322 transitions. [2019-11-06 22:09:14,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 322 transitions. [2019-11-06 22:09:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 22:09:14,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:14,876 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:14,876 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 816788357, now seen corresponding path program 1 times [2019-11-06 22:09:14,890 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:14,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820736047] [2019-11-06 22:09:14,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:15,278 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2019-11-06 22:09:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:15,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820736047] [2019-11-06 22:09:15,308 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:15,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:09:15,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310840431] [2019-11-06 22:09:15,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:09:15,309 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:09:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:15,310 INFO L87 Difference]: Start difference. First operand 189 states and 322 transitions. Second operand 5 states. [2019-11-06 22:09:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:15,967 INFO L93 Difference]: Finished difference Result 292 states and 485 transitions. [2019-11-06 22:09:15,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:09:15,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-06 22:09:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:15,971 INFO L225 Difference]: With dead ends: 292 [2019-11-06 22:09:15,971 INFO L226 Difference]: Without dead ends: 276 [2019-11-06 22:09:15,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-11-06 22:09:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 259. [2019-11-06 22:09:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-06 22:09:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 436 transitions. [2019-11-06 22:09:15,990 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 436 transitions. Word has length 21 [2019-11-06 22:09:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:15,990 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 436 transitions. [2019-11-06 22:09:15,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:09:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 436 transitions. [2019-11-06 22:09:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 22:09:15,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:15,992 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:15,992 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1993084704, now seen corresponding path program 1 times [2019-11-06 22:09:15,993 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:15,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348380866] [2019-11-06 22:09:15,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:16,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348380866] [2019-11-06 22:09:16,058 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:16,058 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:16,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371370625] [2019-11-06 22:09:16,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:16,059 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:16,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:16,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:16,060 INFO L87 Difference]: Start difference. First operand 259 states and 436 transitions. Second operand 4 states. [2019-11-06 22:09:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:16,328 INFO L93 Difference]: Finished difference Result 468 states and 791 transitions. [2019-11-06 22:09:16,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:16,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-06 22:09:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:16,330 INFO L225 Difference]: With dead ends: 468 [2019-11-06 22:09:16,331 INFO L226 Difference]: Without dead ends: 216 [2019-11-06 22:09:16,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-06 22:09:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-11-06 22:09:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-06 22:09:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 355 transitions. [2019-11-06 22:09:16,344 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 355 transitions. Word has length 22 [2019-11-06 22:09:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:16,345 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 355 transitions. [2019-11-06 22:09:16,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 355 transitions. [2019-11-06 22:09:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 22:09:16,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:16,347 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:16,347 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -365898165, now seen corresponding path program 1 times [2019-11-06 22:09:16,348 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:16,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139921196] [2019-11-06 22:09:16,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:16,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139921196] [2019-11-06 22:09:16,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085429130] [2019-11-06 22:09:16,432 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 22:09:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:16,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:09:16,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:16,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:09:16,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449523860] [2019-11-06 22:09:16,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:16,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:16,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:16,556 INFO L87 Difference]: Start difference. First operand 214 states and 355 transitions. Second operand 3 states. [2019-11-06 22:09:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:16,586 INFO L93 Difference]: Finished difference Result 389 states and 646 transitions. [2019-11-06 22:09:16,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:16,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-06 22:09:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:16,588 INFO L225 Difference]: With dead ends: 389 [2019-11-06 22:09:16,588 INFO L226 Difference]: Without dead ends: 182 [2019-11-06 22:09:16,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-06 22:09:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2019-11-06 22:09:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-06 22:09:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 291 transitions. [2019-11-06 22:09:16,599 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 291 transitions. Word has length 28 [2019-11-06 22:09:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:16,600 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 291 transitions. [2019-11-06 22:09:16,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 291 transitions. [2019-11-06 22:09:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 22:09:16,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:16,602 INFO L410 BasicCegarLoop]: trace histogram [3, 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 22:09:16,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:16,806 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1624798356, now seen corresponding path program 1 times [2019-11-06 22:09:16,807 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:16,807 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038866965] [2019-11-06 22:09:16,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:16,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038866965] [2019-11-06 22:09:16,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679468628] [2019-11-06 22:09:16,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:16,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:09:16,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:17,008 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:17,008 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-11-06 22:09:17,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777107992] [2019-11-06 22:09:17,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:09:17,010 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:17,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:09:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:17,011 INFO L87 Difference]: Start difference. First operand 180 states and 291 transitions. Second operand 5 states. [2019-11-06 22:09:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:17,654 INFO L93 Difference]: Finished difference Result 435 states and 706 transitions. [2019-11-06 22:09:17,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:09:17,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-06 22:09:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:17,657 INFO L225 Difference]: With dead ends: 435 [2019-11-06 22:09:17,657 INFO L226 Difference]: Without dead ends: 282 [2019-11-06 22:09:17,658 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-11-06 22:09:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2019-11-06 22:09:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-11-06 22:09:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 408 transitions. [2019-11-06 22:09:17,670 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 408 transitions. Word has length 30 [2019-11-06 22:09:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:17,670 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 408 transitions. [2019-11-06 22:09:17,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:09:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 408 transitions. [2019-11-06 22:09:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 22:09:17,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:17,672 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 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 22:09:17,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:17,879 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash -944739986, now seen corresponding path program 1 times [2019-11-06 22:09:17,880 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:17,880 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632526992] [2019-11-06 22:09:17,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:17,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632526992] [2019-11-06 22:09:17,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212419245] [2019-11-06 22:09:17,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:18,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:09:18,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:18,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:18,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 22:09:18,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017384859] [2019-11-06 22:09:18,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:09:18,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:09:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:18,050 INFO L87 Difference]: Start difference. First operand 245 states and 408 transitions. Second operand 6 states. [2019-11-06 22:09:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:18,742 INFO L93 Difference]: Finished difference Result 464 states and 780 transitions. [2019-11-06 22:09:18,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:09:18,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-06 22:09:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:18,747 INFO L225 Difference]: With dead ends: 464 [2019-11-06 22:09:18,747 INFO L226 Difference]: Without dead ends: 452 [2019-11-06 22:09:18,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-11-06 22:09:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2019-11-06 22:09:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2019-11-06 22:09:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 730 transitions. [2019-11-06 22:09:18,763 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 730 transitions. Word has length 30 [2019-11-06 22:09:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:18,764 INFO L462 AbstractCegarLoop]: Abstraction has 438 states and 730 transitions. [2019-11-06 22:09:18,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:09:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 730 transitions. [2019-11-06 22:09:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 22:09:18,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:18,765 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 22:09:18,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:18,972 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:18,972 INFO L82 PathProgramCache]: Analyzing trace with hash 789275061, now seen corresponding path program 1 times [2019-11-06 22:09:18,973 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:18,973 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350359345] [2019-11-06 22:09:18,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:19,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350359345] [2019-11-06 22:09:19,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112614171] [2019-11-06 22:09:19,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:19,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:09:19,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:19,241 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:19,241 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2019-11-06 22:09:19,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469858253] [2019-11-06 22:09:19,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:09:19,242 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:09:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:19,243 INFO L87 Difference]: Start difference. First operand 438 states and 730 transitions. Second operand 7 states. [2019-11-06 22:09:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:20,009 INFO L93 Difference]: Finished difference Result 495 states and 817 transitions. [2019-11-06 22:09:20,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:09:20,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-06 22:09:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:20,012 INFO L225 Difference]: With dead ends: 495 [2019-11-06 22:09:20,012 INFO L226 Difference]: Without dead ends: 490 [2019-11-06 22:09:20,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:20,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-11-06 22:09:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 484. [2019-11-06 22:09:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-11-06 22:09:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 802 transitions. [2019-11-06 22:09:20,028 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 802 transitions. Word has length 31 [2019-11-06 22:09:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:20,029 INFO L462 AbstractCegarLoop]: Abstraction has 484 states and 802 transitions. [2019-11-06 22:09:20,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:09:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 802 transitions. [2019-11-06 22:09:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:09:20,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:20,031 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:20,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:20,235 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2038890699, now seen corresponding path program 1 times [2019-11-06 22:09:20,236 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:20,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283775210] [2019-11-06 22:09:20,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:09:20,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283775210] [2019-11-06 22:09:20,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:20,328 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:20,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518173335] [2019-11-06 22:09:20,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:20,329 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:20,329 INFO L87 Difference]: Start difference. First operand 484 states and 802 transitions. Second operand 4 states. [2019-11-06 22:09:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:20,605 INFO L93 Difference]: Finished difference Result 949 states and 1566 transitions. [2019-11-06 22:09:20,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:20,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:09:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:20,609 INFO L225 Difference]: With dead ends: 949 [2019-11-06 22:09:20,610 INFO L226 Difference]: Without dead ends: 495 [2019-11-06 22:09:20,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-11-06 22:09:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2019-11-06 22:09:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-11-06 22:09:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 794 transitions. [2019-11-06 22:09:20,627 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 794 transitions. Word has length 32 [2019-11-06 22:09:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:20,628 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 794 transitions. [2019-11-06 22:09:20,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 794 transitions. [2019-11-06 22:09:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:09:20,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:20,629 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 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 22:09:20,629 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash 820851006, now seen corresponding path program 1 times [2019-11-06 22:09:20,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:20,630 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989621118] [2019-11-06 22:09:20,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:20,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989621118] [2019-11-06 22:09:20,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:20,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:20,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260226067] [2019-11-06 22:09:20,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:20,687 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:20,687 INFO L87 Difference]: Start difference. First operand 493 states and 794 transitions. Second operand 4 states. [2019-11-06 22:09:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:20,844 INFO L93 Difference]: Finished difference Result 939 states and 1525 transitions. [2019-11-06 22:09:20,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:20,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-11-06 22:09:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:20,848 INFO L225 Difference]: With dead ends: 939 [2019-11-06 22:09:20,848 INFO L226 Difference]: Without dead ends: 495 [2019-11-06 22:09:20,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-11-06 22:09:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2019-11-06 22:09:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-11-06 22:09:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 788 transitions. [2019-11-06 22:09:20,865 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 788 transitions. Word has length 40 [2019-11-06 22:09:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:20,865 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 788 transitions. [2019-11-06 22:09:20,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 788 transitions. [2019-11-06 22:09:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 22:09:20,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:20,867 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:20,867 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1867136664, now seen corresponding path program 1 times [2019-11-06 22:09:20,868 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:20,868 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560002630] [2019-11-06 22:09:20,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:21,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560002630] [2019-11-06 22:09:21,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86064758] [2019-11-06 22:09:21,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:21,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:09:21,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:09:21,229 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:21,230 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-11-06 22:09:21,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255846680] [2019-11-06 22:09:21,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:09:21,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:21,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:09:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:21,231 INFO L87 Difference]: Start difference. First operand 493 states and 788 transitions. Second operand 9 states. [2019-11-06 22:09:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:22,537 INFO L93 Difference]: Finished difference Result 1034 states and 1641 transitions. [2019-11-06 22:09:22,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:09:22,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-06 22:09:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:22,542 INFO L225 Difference]: With dead ends: 1034 [2019-11-06 22:09:22,542 INFO L226 Difference]: Without dead ends: 583 [2019-11-06 22:09:22,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:09:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2019-11-06 22:09:22,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 544. [2019-11-06 22:09:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-11-06 22:09:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 867 transitions. [2019-11-06 22:09:22,575 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 867 transitions. Word has length 41 [2019-11-06 22:09:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:22,576 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 867 transitions. [2019-11-06 22:09:22,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:09:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 867 transitions. [2019-11-06 22:09:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:09:22,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:22,578 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:22,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:22,784 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2035215205, now seen corresponding path program 1 times [2019-11-06 22:09:22,785 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:22,785 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898538792] [2019-11-06 22:09:22,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:09:22,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898538792] [2019-11-06 22:09:22,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325813468] [2019-11-06 22:09:22,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:23,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:09:23,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:09:23,043 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:23,043 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-11-06 22:09:23,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147087156] [2019-11-06 22:09:23,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:09:23,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:23,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:09:23,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:23,046 INFO L87 Difference]: Start difference. First operand 544 states and 867 transitions. Second operand 5 states. [2019-11-06 22:09:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:23,540 INFO L93 Difference]: Finished difference Result 558 states and 879 transitions. [2019-11-06 22:09:23,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:09:23,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-11-06 22:09:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:23,545 INFO L225 Difference]: With dead ends: 558 [2019-11-06 22:09:23,545 INFO L226 Difference]: Without dead ends: 546 [2019-11-06 22:09:23,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2019-11-06 22:09:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2019-11-06 22:09:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-11-06 22:09:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 841 transitions. [2019-11-06 22:09:23,563 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 841 transitions. Word has length 42 [2019-11-06 22:09:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:23,563 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 841 transitions. [2019-11-06 22:09:23,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:09:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 841 transitions. [2019-11-06 22:09:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 22:09:23,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:23,564 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:23,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:23,768 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1265387988, now seen corresponding path program 1 times [2019-11-06 22:09:23,769 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:23,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126578207] [2019-11-06 22:09:23,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:23,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126578207] [2019-11-06 22:09:23,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504768146] [2019-11-06 22:09:23,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:24,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:09:24,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:24,104 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:24,104 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-06 22:09:24,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351696226] [2019-11-06 22:09:24,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:09:24,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:09:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:24,106 INFO L87 Difference]: Start difference. First operand 544 states and 841 transitions. Second operand 6 states. [2019-11-06 22:09:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:24,841 INFO L93 Difference]: Finished difference Result 553 states and 848 transitions. [2019-11-06 22:09:24,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:09:24,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-11-06 22:09:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:24,846 INFO L225 Difference]: With dead ends: 553 [2019-11-06 22:09:24,846 INFO L226 Difference]: Without dead ends: 551 [2019-11-06 22:09:24,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2019-11-06 22:09:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 545. [2019-11-06 22:09:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-11-06 22:09:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 842 transitions. [2019-11-06 22:09:24,869 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 842 transitions. Word has length 44 [2019-11-06 22:09:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:24,870 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 842 transitions. [2019-11-06 22:09:24,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:09:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 842 transitions. [2019-11-06 22:09:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 22:09:24,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:24,871 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:25,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:25,084 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash -447084202, now seen corresponding path program 1 times [2019-11-06 22:09:25,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:25,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574068381] [2019-11-06 22:09:25,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:25,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574068381] [2019-11-06 22:09:25,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:25,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:25,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074763077] [2019-11-06 22:09:25,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:25,138 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:25,139 INFO L87 Difference]: Start difference. First operand 545 states and 842 transitions. Second operand 4 states. [2019-11-06 22:09:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:25,369 INFO L93 Difference]: Finished difference Result 1053 states and 1621 transitions. [2019-11-06 22:09:25,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:25,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-11-06 22:09:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:25,372 INFO L225 Difference]: With dead ends: 1053 [2019-11-06 22:09:25,372 INFO L226 Difference]: Without dead ends: 557 [2019-11-06 22:09:25,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-11-06 22:09:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 555. [2019-11-06 22:09:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-11-06 22:09:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 835 transitions. [2019-11-06 22:09:25,392 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 835 transitions. Word has length 45 [2019-11-06 22:09:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:25,393 INFO L462 AbstractCegarLoop]: Abstraction has 555 states and 835 transitions. [2019-11-06 22:09:25,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 835 transitions. [2019-11-06 22:09:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:09:25,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:25,394 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:25,394 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1882634818, now seen corresponding path program 1 times [2019-11-06 22:09:25,394 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:25,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105998265] [2019-11-06 22:09:25,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-06 22:09:25,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105998265] [2019-11-06 22:09:25,471 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:25,471 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:09:25,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093766236] [2019-11-06 22:09:25,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:09:25,472 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:25,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:09:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:25,472 INFO L87 Difference]: Start difference. First operand 555 states and 835 transitions. Second operand 4 states. [2019-11-06 22:09:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:25,666 INFO L93 Difference]: Finished difference Result 799 states and 1202 transitions. [2019-11-06 22:09:25,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:09:25,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-06 22:09:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:25,672 INFO L225 Difference]: With dead ends: 799 [2019-11-06 22:09:25,672 INFO L226 Difference]: Without dead ends: 313 [2019-11-06 22:09:25,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:09:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-11-06 22:09:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2019-11-06 22:09:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-11-06 22:09:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 454 transitions. [2019-11-06 22:09:25,687 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 454 transitions. Word has length 55 [2019-11-06 22:09:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:25,687 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 454 transitions. [2019-11-06 22:09:25,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:09:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 454 transitions. [2019-11-06 22:09:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:09:25,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:25,689 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:25,689 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1573307774, now seen corresponding path program 1 times [2019-11-06 22:09:25,690 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:25,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468279039] [2019-11-06 22:09:25,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:09:25,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468279039] [2019-11-06 22:09:25,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867123759] [2019-11-06 22:09:25,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:25,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:09:25,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:09:25,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:25,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-06 22:09:25,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509532905] [2019-11-06 22:09:25,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:09:25,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:09:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:25,853 INFO L87 Difference]: Start difference. First operand 311 states and 454 transitions. Second operand 6 states. [2019-11-06 22:09:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:26,631 INFO L93 Difference]: Finished difference Result 660 states and 968 transitions. [2019-11-06 22:09:26,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:09:26,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-11-06 22:09:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:26,634 INFO L225 Difference]: With dead ends: 660 [2019-11-06 22:09:26,634 INFO L226 Difference]: Without dead ends: 418 [2019-11-06 22:09:26,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-11-06 22:09:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 389. [2019-11-06 22:09:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-11-06 22:09:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 573 transitions. [2019-11-06 22:09:26,648 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 573 transitions. Word has length 56 [2019-11-06 22:09:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:26,649 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 573 transitions. [2019-11-06 22:09:26,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:09:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 573 transitions. [2019-11-06 22:09:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:09:26,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:26,650 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:26,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:26,854 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473212, now seen corresponding path program 1 times [2019-11-06 22:09:26,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:26,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505050211] [2019-11-06 22:09:26,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:09:26,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505050211] [2019-11-06 22:09:26,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926208109] [2019-11-06 22:09:26,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:27,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:09:27,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:09:27,062 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:27,062 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-06 22:09:27,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044428580] [2019-11-06 22:09:27,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:09:27,064 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:09:27,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:27,065 INFO L87 Difference]: Start difference. First operand 389 states and 573 transitions. Second operand 6 states. [2019-11-06 22:09:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:27,620 INFO L93 Difference]: Finished difference Result 436 states and 639 transitions. [2019-11-06 22:09:27,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:09:27,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-11-06 22:09:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:27,623 INFO L225 Difference]: With dead ends: 436 [2019-11-06 22:09:27,623 INFO L226 Difference]: Without dead ends: 430 [2019-11-06 22:09:27,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-11-06 22:09:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 427. [2019-11-06 22:09:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-06 22:09:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 627 transitions. [2019-11-06 22:09:27,639 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 627 transitions. Word has length 56 [2019-11-06 22:09:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:27,639 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 627 transitions. [2019-11-06 22:09:27,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:09:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 627 transitions. [2019-11-06 22:09:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:09:27,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:27,640 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:27,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:27,844 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1104488738, now seen corresponding path program 1 times [2019-11-06 22:09:27,845 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:27,848 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133032493] [2019-11-06 22:09:27,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:28,059 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133032493] [2019-11-06 22:09:28,060 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570765500] [2019-11-06 22:09:28,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:28,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 22:09:28,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:28,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:28,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-11-06 22:09:28,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166569723] [2019-11-06 22:09:28,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:09:28,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:28,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:09:28,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:28,205 INFO L87 Difference]: Start difference. First operand 427 states and 627 transitions. Second operand 10 states. [2019-11-06 22:09:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:28,975 INFO L93 Difference]: Finished difference Result 429 states and 628 transitions. [2019-11-06 22:09:28,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:09:28,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-11-06 22:09:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:28,979 INFO L225 Difference]: With dead ends: 429 [2019-11-06 22:09:28,979 INFO L226 Difference]: Without dead ends: 427 [2019-11-06 22:09:28,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:09:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-11-06 22:09:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2019-11-06 22:09:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-06 22:09:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 626 transitions. [2019-11-06 22:09:28,993 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 626 transitions. Word has length 60 [2019-11-06 22:09:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:28,993 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 626 transitions. [2019-11-06 22:09:28,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:09:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 626 transitions. [2019-11-06 22:09:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 22:09:28,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:28,995 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:29,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:29,200 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 855434068, now seen corresponding path program 1 times [2019-11-06 22:09:29,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:29,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068151468] [2019-11-06 22:09:29,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:29,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068151468] [2019-11-06 22:09:29,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25094533] [2019-11-06 22:09:29,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:09:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:29,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 22:09:29,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:29,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:29,759 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-11-06 22:09:29,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496190990] [2019-11-06 22:09:29,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:09:29,760 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:29,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:09:29,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:09:29,761 INFO L87 Difference]: Start difference. First operand 427 states and 626 transitions. Second operand 12 states. [2019-11-06 22:09:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:31,530 INFO L93 Difference]: Finished difference Result 455 states and 652 transitions. [2019-11-06 22:09:31,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:09:31,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2019-11-06 22:09:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:31,533 INFO L225 Difference]: With dead ends: 455 [2019-11-06 22:09:31,533 INFO L226 Difference]: Without dead ends: 453 [2019-11-06 22:09:31,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:09:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-06 22:09:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 428. [2019-11-06 22:09:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2019-11-06 22:09:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 627 transitions. [2019-11-06 22:09:31,547 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 627 transitions. Word has length 67 [2019-11-06 22:09:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:31,548 INFO L462 AbstractCegarLoop]: Abstraction has 428 states and 627 transitions. [2019-11-06 22:09:31,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:09:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 627 transitions. [2019-11-06 22:09:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 22:09:31,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:31,549 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:31,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:31,756 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1201928326, now seen corresponding path program 1 times [2019-11-06 22:09:31,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:31,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730796905] [2019-11-06 22:09:31,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:31,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730796905] [2019-11-06 22:09:31,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252752291] [2019-11-06 22:09:31,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:31,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:09:31,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:31,958 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:31,959 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-11-06 22:09:31,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533925473] [2019-11-06 22:09:31,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:09:31,960 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:31,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:09:31,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:31,960 INFO L87 Difference]: Start difference. First operand 428 states and 627 transitions. Second operand 7 states. [2019-11-06 22:09:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:32,991 INFO L93 Difference]: Finished difference Result 865 states and 1269 transitions. [2019-11-06 22:09:32,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:09:32,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2019-11-06 22:09:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:32,995 INFO L225 Difference]: With dead ends: 865 [2019-11-06 22:09:32,995 INFO L226 Difference]: Without dead ends: 545 [2019-11-06 22:09:32,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:09:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-11-06 22:09:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 506. [2019-11-06 22:09:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2019-11-06 22:09:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 746 transitions. [2019-11-06 22:09:33,012 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 746 transitions. Word has length 77 [2019-11-06 22:09:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:33,013 INFO L462 AbstractCegarLoop]: Abstraction has 506 states and 746 transitions. [2019-11-06 22:09:33,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:09:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 746 transitions. [2019-11-06 22:09:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 22:09:33,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:33,014 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:33,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:33,217 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash 808901316, now seen corresponding path program 1 times [2019-11-06 22:09:33,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:33,219 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376767712] [2019-11-06 22:09:33,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:33,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376767712] [2019-11-06 22:09:33,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294621478] [2019-11-06 22:09:33,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:33,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 22:09:33,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:33,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:09:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:33,656 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:33,656 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2019-11-06 22:09:33,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337673457] [2019-11-06 22:09:33,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 22:09:33,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:09:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:09:33,657 INFO L87 Difference]: Start difference. First operand 506 states and 746 transitions. Second operand 14 states. [2019-11-06 22:09:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:35,264 INFO L93 Difference]: Finished difference Result 529 states and 778 transitions. [2019-11-06 22:09:35,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:09:35,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-11-06 22:09:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:35,267 INFO L225 Difference]: With dead ends: 529 [2019-11-06 22:09:35,267 INFO L226 Difference]: Without dead ends: 525 [2019-11-06 22:09:35,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2019-11-06 22:09:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-11-06 22:09:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2019-11-06 22:09:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-11-06 22:09:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 772 transitions. [2019-11-06 22:09:35,286 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 772 transitions. Word has length 77 [2019-11-06 22:09:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:35,286 INFO L462 AbstractCegarLoop]: Abstraction has 525 states and 772 transitions. [2019-11-06 22:09:35,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 22:09:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 772 transitions. [2019-11-06 22:09:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 22:09:35,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:35,287 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:35,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:35,491 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash 704934839, now seen corresponding path program 1 times [2019-11-06 22:09:35,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:35,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895386321] [2019-11-06 22:09:35,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:35,899 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 20 [2019-11-06 22:09:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 99 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:09:35,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895386321] [2019-11-06 22:09:35,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371920657] [2019-11-06 22:09:35,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:36,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:09:36,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 22:09:36,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:36,087 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-06 22:09:36,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990059209] [2019-11-06 22:09:36,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:09:36,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:09:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:36,088 INFO L87 Difference]: Start difference. First operand 525 states and 772 transitions. Second operand 10 states. [2019-11-06 22:09:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:37,192 INFO L93 Difference]: Finished difference Result 555 states and 810 transitions. [2019-11-06 22:09:37,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:09:37,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2019-11-06 22:09:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:37,198 INFO L225 Difference]: With dead ends: 555 [2019-11-06 22:09:37,198 INFO L226 Difference]: Without dead ends: 551 [2019-11-06 22:09:37,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:09:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2019-11-06 22:09:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 544. [2019-11-06 22:09:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-11-06 22:09:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 798 transitions. [2019-11-06 22:09:37,214 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 798 transitions. Word has length 87 [2019-11-06 22:09:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:37,214 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 798 transitions. [2019-11-06 22:09:37,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:09:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 798 transitions. [2019-11-06 22:09:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:09:37,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:37,216 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:37,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:37,420 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:37,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1100197245, now seen corresponding path program 1 times [2019-11-06 22:09:37,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:37,423 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913509495] [2019-11-06 22:09:37,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:37,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913509495] [2019-11-06 22:09:37,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716622514] [2019-11-06 22:09:37,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:37,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 22:09:37,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:38,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:09:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:38,102 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:38,102 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-06 22:09:38,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283149734] [2019-11-06 22:09:38,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 22:09:38,103 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:09:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:09:38,104 INFO L87 Difference]: Start difference. First operand 544 states and 798 transitions. Second operand 14 states. [2019-11-06 22:09:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:39,633 INFO L93 Difference]: Finished difference Result 547 states and 801 transitions. [2019-11-06 22:09:39,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:09:39,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2019-11-06 22:09:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:39,635 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:09:39,635 INFO L226 Difference]: Without dead ends: 545 [2019-11-06 22:09:39,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:09:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-11-06 22:09:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2019-11-06 22:09:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-11-06 22:09:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 799 transitions. [2019-11-06 22:09:39,650 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 799 transitions. Word has length 90 [2019-11-06 22:09:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:39,650 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 799 transitions. [2019-11-06 22:09:39,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 22:09:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 799 transitions. [2019-11-06 22:09:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 22:09:39,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:39,652 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:39,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:39,855 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1191267151, now seen corresponding path program 1 times [2019-11-06 22:09:39,856 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:39,856 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849559950] [2019-11-06 22:09:39,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 54 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 22:09:39,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849559950] [2019-11-06 22:09:39,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381714337] [2019-11-06 22:09:39,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:09:40,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 54 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 22:09:40,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:40,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-11-06 22:09:40,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428010786] [2019-11-06 22:09:40,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:09:40,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:09:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:09:40,164 INFO L87 Difference]: Start difference. First operand 545 states and 799 transitions. Second operand 8 states. [2019-11-06 22:09:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:41,444 INFO L93 Difference]: Finished difference Result 1070 states and 1569 transitions. [2019-11-06 22:09:41,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:09:41,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-11-06 22:09:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:41,449 INFO L225 Difference]: With dead ends: 1070 [2019-11-06 22:09:41,449 INFO L226 Difference]: Without dead ends: 672 [2019-11-06 22:09:41,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-11-06 22:09:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 623. [2019-11-06 22:09:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 22:09:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 918 transitions. [2019-11-06 22:09:41,467 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 918 transitions. Word has length 102 [2019-11-06 22:09:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:41,467 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 918 transitions. [2019-11-06 22:09:41,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:09:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 918 transitions. [2019-11-06 22:09:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 22:09:41,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:41,469 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:41,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:41,674 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1449432589, now seen corresponding path program 1 times [2019-11-06 22:09:41,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:41,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208866384] [2019-11-06 22:09:41,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 22:09:41,821 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208866384] [2019-11-06 22:09:41,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570844268] [2019-11-06 22:09:41,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 22:09:41,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 22:09:42,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:42,030 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-11-06 22:09:42,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33724549] [2019-11-06 22:09:42,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:09:42,039 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:09:42,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:09:42,040 INFO L87 Difference]: Start difference. First operand 623 states and 918 transitions. Second operand 8 states. [2019-11-06 22:09:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:43,161 INFO L93 Difference]: Finished difference Result 670 states and 984 transitions. [2019-11-06 22:09:43,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:09:43,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-11-06 22:09:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:43,164 INFO L225 Difference]: With dead ends: 670 [2019-11-06 22:09:43,164 INFO L226 Difference]: Without dead ends: 664 [2019-11-06 22:09:43,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-11-06 22:09:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 661. [2019-11-06 22:09:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-11-06 22:09:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 972 transitions. [2019-11-06 22:09:43,181 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 972 transitions. Word has length 102 [2019-11-06 22:09:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:43,182 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 972 transitions. [2019-11-06 22:09:43,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:09:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 972 transitions. [2019-11-06 22:09:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 22:09:43,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:43,183 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:43,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:43,388 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash -669250513, now seen corresponding path program 1 times [2019-11-06 22:09:43,389 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:43,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295154035] [2019-11-06 22:09:43,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:43,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295154035] [2019-11-06 22:09:43,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381631248] [2019-11-06 22:09:43,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 22:09:43,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:43,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:09:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 160 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:43,952 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:43,952 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-11-06 22:09:43,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741862179] [2019-11-06 22:09:43,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:09:43,953 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:09:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:09:43,954 INFO L87 Difference]: Start difference. First operand 661 states and 972 transitions. Second operand 16 states. [2019-11-06 22:09:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:46,269 INFO L93 Difference]: Finished difference Result 663 states and 973 transitions. [2019-11-06 22:09:46,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:09:46,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2019-11-06 22:09:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:46,273 INFO L225 Difference]: With dead ends: 663 [2019-11-06 22:09:46,273 INFO L226 Difference]: Without dead ends: 661 [2019-11-06 22:09:46,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2019-11-06 22:09:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-11-06 22:09:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2019-11-06 22:09:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-11-06 22:09:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 971 transitions. [2019-11-06 22:09:46,290 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 971 transitions. Word has length 106 [2019-11-06 22:09:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:46,291 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 971 transitions. [2019-11-06 22:09:46,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:09:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 971 transitions. [2019-11-06 22:09:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:09:46,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:46,292 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:46,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:46,496 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1267384093, now seen corresponding path program 2 times [2019-11-06 22:09:46,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:46,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003636854] [2019-11-06 22:09:46,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:09:46,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003636854] [2019-11-06 22:09:46,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961303247] [2019-11-06 22:09:46,993 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:47,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:09:47,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:47,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 22:09:47,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:47,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:09:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:09:47,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:47,370 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2019-11-06 22:09:47,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920525384] [2019-11-06 22:09:47,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 22:09:47,371 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 22:09:47,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:09:47,392 INFO L87 Difference]: Start difference. First operand 661 states and 971 transitions. Second operand 20 states.