/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/reducercommutativity/avg10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:09:36,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:09:36,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:09:36,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:09:36,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:09:36,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:09:36,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:09:36,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:09:36,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:09:36,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:09:36,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:09:36,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:09:36,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:09:36,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:09:36,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:09:36,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:09:36,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:09:36,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:09:36,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:09:36,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:09:36,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:09:36,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:09:36,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:09:36,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:09:36,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:09:36,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:09:36,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:09:36,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:09:36,291 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 22:09:36,310 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:09:36,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:09:36,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:09:36,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:09:36,313 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:09:36,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:09:36,314 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:09:36,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:09:36,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:09:36,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:09:36,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:09:36,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:09:36,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:09:36,316 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:09:36,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:09:36,317 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:09:36,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:09:36,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:09:36,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:09:36,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:09:36,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:09:36,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:09:36,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:09:36,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:09:36,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:09:36,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:09:36,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:09:36,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:09:36,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:09:36,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:09:36,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:09:36,647 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:09:36,648 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:09:36,649 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:09:36,650 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg10-2.i [2019-11-06 22:09:36,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce580f7b/db1410baf3a546ee8589a7a7f42be933/FLAG5478629a4 [2019-11-06 22:09:37,194 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:09:37,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg10-2.i [2019-11-06 22:09:37,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce580f7b/db1410baf3a546ee8589a7a7f42be933/FLAG5478629a4 [2019-11-06 22:09:37,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce580f7b/db1410baf3a546ee8589a7a7f42be933 [2019-11-06 22:09:37,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:09:37,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:09:37,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:09:37,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:09:37,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:09:37,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5446a551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37, skipping insertion in model container [2019-11-06 22:09:37,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,588 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:09:37,609 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:09:37,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:09:37,805 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:09:37,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:09:37,843 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:09:37,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37 WrapperNode [2019-11-06 22:09:37,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:09:37,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:09:37,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:09:37,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:09:37,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (1/1) ... [2019-11-06 22:09:37,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:09:37,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:09:37,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:09:37,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:09:37,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (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 22:09:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:09:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:09:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-11-06 22:09:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:09:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:09:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:09:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-11-06 22:09:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:09:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:09:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:09:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:09:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:09:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:09:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:09:38,320 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:09:38,321 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:09:38,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:38 BoogieIcfgContainer [2019-11-06 22:09:38,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:09:38,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:09:38,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:09:38,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:09:38,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:09:37" (1/3) ... [2019-11-06 22:09:38,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb05ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:38, skipping insertion in model container [2019-11-06 22:09:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:37" (2/3) ... [2019-11-06 22:09:38,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb05ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:38, skipping insertion in model container [2019-11-06 22:09:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:38" (3/3) ... [2019-11-06 22:09:38,331 INFO L109 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2019-11-06 22:09:38,342 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:09:38,348 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:09:38,359 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:09:38,384 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:09:38,385 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:09:38,385 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:09:38,385 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:09:38,385 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:09:38,385 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:09:38,385 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:09:38,386 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:09:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 22:09:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:09:38,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:38,408 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:38,411 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:38,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 22:09:38,423 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:38,423 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119125152] [2019-11-06 22:09:38,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:09:38,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119125152] [2019-11-06 22:09:38,680 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:09:38,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:09:38,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412044114] [2019-11-06 22:09:38,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:38,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:09:38,709 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 22:09:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:38,840 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 22:09:38,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:38,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:09:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:38,854 INFO L225 Difference]: With dead ends: 54 [2019-11-06 22:09:38,854 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 22:09:38,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:09:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 22:09:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 22:09:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 22:09:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 22:09:38,894 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 22:09:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:38,895 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 22:09:38,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 22:09:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:09:38,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:38,898 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:38,898 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 22:09:38,899 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:38,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33844031] [2019-11-06 22:09:38,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:09:39,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33844031] [2019-11-06 22:09:39,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959663795] [2019-11-06 22:09:39,036 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 22:09:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:39,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:09:39,167 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:39,167 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:09:39,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007858726] [2019-11-06 22:09:39,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:39,172 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:39,173 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 22:09:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:39,192 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 22:09:39,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:39,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:09:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:39,194 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:09:39,194 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 22:09:39,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:09:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 22:09:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 22:09:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 22:09:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 22:09:39,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 22:09:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:39,212 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 22:09:39,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 22:09:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:09:39,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:39,215 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:39,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:39,420 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 22:09:39,421 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:39,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501783253] [2019-11-06 22:09:39,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:09:39,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501783253] [2019-11-06 22:09:39,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395743396] [2019-11-06 22:09:39,576 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 22:09:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:39,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:09:39,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:39,658 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:09:39,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504492764] [2019-11-06 22:09:39,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:39,659 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:39,660 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 22:09:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:39,680 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 22:09:39,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:39,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:09:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:39,682 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:09:39,682 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 22:09:39,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:09:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 22:09:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 22:09:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 22:09:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 22:09:39,689 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 22:09:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:39,689 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 22:09:39,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 22:09:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:09:39,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:39,691 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:39,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:39,903 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:39,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 22:09:39,904 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:39,904 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784867592] [2019-11-06 22:09:39,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:09:40,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784867592] [2019-11-06 22:09:40,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131924940] [2019-11-06 22:09:40,009 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 22:09:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:09:40,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 22:09:40,096 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:09:40,096 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 22:09:40,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369931812] [2019-11-06 22:09:40,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:09:40,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:09:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:40,098 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 22:09:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:40,111 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 22:09:40,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:09:40,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 22:09:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:40,115 INFO L225 Difference]: With dead ends: 43 [2019-11-06 22:09:40,116 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 22:09:40,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 22:09:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 22:09:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:09:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 22:09:40,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 22:09:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:40,124 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 22:09:40,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:09:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 22:09:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:09:40,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:40,126 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:40,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:40,330 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 22:09:40,330 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:40,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049320301] [2019-11-06 22:09:40,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:09:40,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049320301] [2019-11-06 22:09:40,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218520458] [2019-11-06 22:09:40,444 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 22:09:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:09:40,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 22:09:40,536 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:40,538 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 22:09:40,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534690711] [2019-11-06 22:09:40,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:09:40,539 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:09:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:09:40,540 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 22:09:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:40,663 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 22:09:40,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:09:40,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 22:09:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:40,665 INFO L225 Difference]: With dead ends: 55 [2019-11-06 22:09:40,665 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 22:09:40,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 22:09:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 22:09:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:09:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 22:09:40,673 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 22:09:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:40,673 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 22:09:40,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:09:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 22:09:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:09:40,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:40,676 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2019-11-06 22:09:40,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:40,880 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 22:09:40,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:40,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207267316] [2019-11-06 22:09:40,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:09:41,031 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207267316] [2019-11-06 22:09:41,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903592094] [2019-11-06 22:09:41,032 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 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 22:09:41,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:09:41,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:41,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:09:41,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:09:41,131 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:41,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:09:41,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996688727] [2019-11-06 22:09:41,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:09:41,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:09:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:41,133 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 22:09:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:41,229 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 22:09:41,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:09:41,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 22:09:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:41,230 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:09:41,230 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 22:09:41,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:09:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 22:09:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 22:09:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 22:09:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 22:09:41,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 22:09:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:41,237 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 22:09:41,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:09:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 22:09:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:09:41,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:41,239 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:41,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:41,450 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 22:09:41,451 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:41,451 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202288372] [2019-11-06 22:09:41,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:09:41,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202288372] [2019-11-06 22:09:41,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562648162] [2019-11-06 22:09:41,561 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:41,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 22:09:41,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:41,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:09:41,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 22:09:41,664 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:41,665 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:09:41,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771318784] [2019-11-06 22:09:41,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:09:41,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:41,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:09:41,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:41,666 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 22:09:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:41,801 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 22:09:41,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:09:41,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 22:09:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:41,806 INFO L225 Difference]: With dead ends: 63 [2019-11-06 22:09:41,806 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 22:09:41,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 22:09:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 22:09:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:09:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 22:09:41,816 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 22:09:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:41,818 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 22:09:41,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:09:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 22:09:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:09:41,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:41,821 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:42,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:42,022 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 22:09:42,023 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:42,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862730309] [2019-11-06 22:09:42,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:09:42,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862730309] [2019-11-06 22:09:42,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702544612] [2019-11-06 22:09:42,146 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:42,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:09:42,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:42,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:09:42,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 22:09:42,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:42,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 22:09:42,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170051768] [2019-11-06 22:09:42,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:09:42,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:09:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:09:42,262 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2019-11-06 22:09:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:42,463 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-11-06 22:09:42,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:09:42,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-11-06 22:09:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:42,464 INFO L225 Difference]: With dead ends: 69 [2019-11-06 22:09:42,465 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 22:09:42,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:09:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 22:09:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-11-06 22:09:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 22:09:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-06 22:09:42,471 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-11-06 22:09:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:42,472 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-06 22:09:42,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:09:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-06 22:09:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:09:42,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:42,473 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:42,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:42,685 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1255780885, now seen corresponding path program 5 times [2019-11-06 22:09:42,686 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:42,687 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046398580] [2019-11-06 22:09:42,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 22:09:42,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046398580] [2019-11-06 22:09:42,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353965906] [2019-11-06 22:09:42,843 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:43,011 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-06 22:09:43,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:43,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:09:43,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 52 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 22:09:43,090 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:43,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-06 22:09:43,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404036035] [2019-11-06 22:09:43,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:09:43,093 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:09:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:43,094 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2019-11-06 22:09:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:43,307 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2019-11-06 22:09:43,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:09:43,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2019-11-06 22:09:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:43,309 INFO L225 Difference]: With dead ends: 75 [2019-11-06 22:09:43,309 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 22:09:43,310 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:09:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 22:09:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-06 22:09:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 22:09:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-11-06 22:09:43,320 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-11-06 22:09:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:43,320 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-11-06 22:09:43,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:09:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-11-06 22:09:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 22:09:43,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:43,322 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:43,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:43,536 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 979769931, now seen corresponding path program 6 times [2019-11-06 22:09:43,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:43,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791520097] [2019-11-06 22:09:43,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:09:43,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791520097] [2019-11-06 22:09:43,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697617426] [2019-11-06 22:09:43,667 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:43,777 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 22:09:43,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:43,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:09:43,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-06 22:09:43,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:43,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-06 22:09:43,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960026173] [2019-11-06 22:09:43,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:09:43,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:09:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:43,853 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 13 states. [2019-11-06 22:09:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:44,049 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2019-11-06 22:09:44,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:09:44,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2019-11-06 22:09:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:44,051 INFO L225 Difference]: With dead ends: 81 [2019-11-06 22:09:44,051 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 22:09:44,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 22:09:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-11-06 22:09:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 22:09:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 22:09:44,064 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-11-06 22:09:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:44,065 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 22:09:44,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:09:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 22:09:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 22:09:44,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:44,074 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:44,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:44,279 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:44,280 INFO L82 PathProgramCache]: Analyzing trace with hash 209462187, now seen corresponding path program 7 times [2019-11-06 22:09:44,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:44,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456730932] [2019-11-06 22:09:44,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:09:44,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456730932] [2019-11-06 22:09:44,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753018584] [2019-11-06 22:09:44,409 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:44,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:09:44,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:09:44,507 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:44,508 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:09:44,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187679358] [2019-11-06 22:09:44,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:09:44,509 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:09:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:09:44,509 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 12 states. [2019-11-06 22:09:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:44,637 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2019-11-06 22:09:44,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:09:44,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2019-11-06 22:09:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:44,639 INFO L225 Difference]: With dead ends: 84 [2019-11-06 22:09:44,639 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 22:09:44,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:09:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 22:09:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 22:09:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:09:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 22:09:44,655 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 22:09:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:44,657 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 22:09:44,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:09:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 22:09:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 22:09:44,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:44,658 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:44,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:44,863 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1779518195, now seen corresponding path program 8 times [2019-11-06 22:09:44,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:44,864 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936652099] [2019-11-06 22:09:44,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:09:45,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936652099] [2019-11-06 22:09:45,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050984678] [2019-11-06 22:09:45,041 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 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 22:09:45,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:09:45,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:45,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:09:45,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:09:45,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:45,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:09:45,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936989447] [2019-11-06 22:09:45,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:09:45,155 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:09:45,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:45,156 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 13 states. [2019-11-06 22:09:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:45,300 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-11-06 22:09:45,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:09:45,301 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2019-11-06 22:09:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:45,302 INFO L225 Difference]: With dead ends: 86 [2019-11-06 22:09:45,302 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 22:09:45,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 22:09:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-06 22:09:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:09:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-11-06 22:09:45,315 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 78 [2019-11-06 22:09:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:45,316 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-11-06 22:09:45,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:09:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-11-06 22:09:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 22:09:45,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:45,317 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:45,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:45,518 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1929218577, now seen corresponding path program 9 times [2019-11-06 22:09:45,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:45,519 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876216090] [2019-11-06 22:09:45,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:09:45,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876216090] [2019-11-06 22:09:45,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525664900] [2019-11-06 22:09:45,691 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:45,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 22:09:45,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:45,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:09:45,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 22:09:45,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:45,874 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-11-06 22:09:45,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912592228] [2019-11-06 22:09:45,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:09:45,875 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:09:45,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:09:45,876 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 18 states. [2019-11-06 22:09:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:46,162 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2019-11-06 22:09:46,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:09:46,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2019-11-06 22:09:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:46,163 INFO L225 Difference]: With dead ends: 90 [2019-11-06 22:09:46,163 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 22:09:46,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:09:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 22:09:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-06 22:09:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 22:09:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-11-06 22:09:46,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-11-06 22:09:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:46,170 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-11-06 22:09:46,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:09:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-11-06 22:09:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:09:46,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:46,172 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:46,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:46,375 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:46,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1396536753, now seen corresponding path program 10 times [2019-11-06 22:09:46,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:46,377 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207302397] [2019-11-06 22:09:46,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-06 22:09:46,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207302397] [2019-11-06 22:09:46,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22803702] [2019-11-06 22:09:46,502 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:46,581 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:09:46,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:46,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:09:46,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2019-11-06 22:09:46,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:46,596 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-11-06 22:09:46,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216095673] [2019-11-06 22:09:46,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:09:46,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:09:46,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:09:46,598 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 9 states. [2019-11-06 22:09:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:46,780 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2019-11-06 22:09:46,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:09:46,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2019-11-06 22:09:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:46,782 INFO L225 Difference]: With dead ends: 93 [2019-11-06 22:09:46,782 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 22:09:46,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:09:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 22:09:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-06 22:09:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:09:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 22:09:46,788 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 88 [2019-11-06 22:09:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:46,788 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 22:09:46,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:09:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 22:09:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:09:46,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:46,790 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:46,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:46,993 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1953474611, now seen corresponding path program 11 times [2019-11-06 22:09:46,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:46,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248526573] [2019-11-06 22:09:46,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-06 22:09:47,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248526573] [2019-11-06 22:09:47,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714836012] [2019-11-06 22:09:47,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:47,429 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-06 22:09:47,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:47,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:09:47,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 22:09:47,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:47,444 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-11-06 22:09:47,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691178445] [2019-11-06 22:09:47,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:09:47,445 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:09:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:47,446 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 10 states. [2019-11-06 22:09:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:47,640 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2019-11-06 22:09:47,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:09:47,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2019-11-06 22:09:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:47,641 INFO L225 Difference]: With dead ends: 97 [2019-11-06 22:09:47,641 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 22:09:47,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:09:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 22:09:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-06 22:09:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 22:09:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-11-06 22:09:47,647 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 94 [2019-11-06 22:09:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:47,648 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-11-06 22:09:47,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:09:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-11-06 22:09:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:09:47,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:47,649 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:47,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:47,854 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1870483147, now seen corresponding path program 12 times [2019-11-06 22:09:47,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:47,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097076332] [2019-11-06 22:09:47,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 116 proven. 165 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-11-06 22:09:48,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097076332] [2019-11-06 22:09:48,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270759491] [2019-11-06 22:09:48,008 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:48,115 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:09:48,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:48,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:09:48,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 234 proven. 9 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-06 22:09:48,190 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:48,190 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-11-06 22:09:48,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167275030] [2019-11-06 22:09:48,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:09:48,191 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:09:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:09:48,191 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 15 states. [2019-11-06 22:09:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:48,471 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2019-11-06 22:09:48,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 22:09:48,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2019-11-06 22:09:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:48,473 INFO L225 Difference]: With dead ends: 104 [2019-11-06 22:09:48,473 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 22:09:48,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:09:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 22:09:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 22:09:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 22:09:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-11-06 22:09:48,477 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 100 [2019-11-06 22:09:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:48,478 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-11-06 22:09:48,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:09:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-11-06 22:09:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 22:09:48,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:48,480 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:48,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:48,684 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash 574148423, now seen corresponding path program 13 times [2019-11-06 22:09:48,685 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:48,685 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358799402] [2019-11-06 22:09:48,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-11-06 22:09:48,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358799402] [2019-11-06 22:09:48,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603367740] [2019-11-06 22:09:48,834 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:48,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:09:48,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 292 proven. 64 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2019-11-06 22:09:49,083 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:49,083 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2019-11-06 22:09:49,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809523192] [2019-11-06 22:09:49,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 22:09:49,085 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:49,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 22:09:49,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:09:49,086 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 17 states. [2019-11-06 22:09:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:49,458 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2019-11-06 22:09:49,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:09:49,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 108 [2019-11-06 22:09:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:49,460 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:09:49,461 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 22:09:49,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-11-06 22:09:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 22:09:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-11-06 22:09:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 22:09:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 22:09:49,468 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 108 [2019-11-06 22:09:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:49,468 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 22:09:49,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 22:09:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 22:09:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:09:49,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:49,470 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 10, 10, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:49,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:49,674 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1608835779, now seen corresponding path program 14 times [2019-11-06 22:09:49,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:49,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959126895] [2019-11-06 22:09:49,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2019-11-06 22:09:49,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959126895] [2019-11-06 22:09:49,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512587577] [2019-11-06 22:09:49,870 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 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 22:09:49,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:09:49,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:49,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:09:49,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2019-11-06 22:09:49,996 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:49,997 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-11-06 22:09:49,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472616990] [2019-11-06 22:09:49,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:09:49,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:09:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:49,998 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 13 states. [2019-11-06 22:09:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:50,262 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2019-11-06 22:09:50,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:09:50,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 116 [2019-11-06 22:09:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:50,263 INFO L225 Difference]: With dead ends: 116 [2019-11-06 22:09:50,263 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 22:09:50,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:09:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 22:09:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-06 22:09:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 22:09:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 22:09:50,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 116 [2019-11-06 22:09:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:50,269 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 22:09:50,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:09:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 22:09:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:09:50,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:50,271 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:50,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:50,480 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash 676955969, now seen corresponding path program 15 times [2019-11-06 22:09:50,481 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:50,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639515514] [2019-11-06 22:09:50,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:09:50,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639515514] [2019-11-06 22:09:50,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804080920] [2019-11-06 22:09:50,597 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:50,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 22:09:50,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:50,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:09:50,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 450 proven. 25 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:09:50,734 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:50,734 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 22:09:50,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719227732] [2019-11-06 22:09:50,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:09:50,735 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:09:50,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:50,735 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 10 states. [2019-11-06 22:09:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:50,850 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-11-06 22:09:50,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:09:50,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 122 [2019-11-06 22:09:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:50,852 INFO L225 Difference]: With dead ends: 107 [2019-11-06 22:09:50,852 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 22:09:50,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:09:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 22:09:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-06 22:09:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:09:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-11-06 22:09:50,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 122 [2019-11-06 22:09:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:50,859 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-11-06 22:09:50,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:09:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-11-06 22:09:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:09:50,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:50,860 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:51,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:51,064 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash 550390079, now seen corresponding path program 16 times [2019-11-06 22:09:51,065 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:51,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819081718] [2019-11-06 22:09:51,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:09:51,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819081718] [2019-11-06 22:09:51,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060702927] [2019-11-06 22:09:51,209 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:51,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:09:51,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:51,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:09:51,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 450 proven. 36 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:09:51,371 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:51,371 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 22:09:51,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270968471] [2019-11-06 22:09:51,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:09:51,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:51,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:09:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:09:51,373 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 11 states. [2019-11-06 22:09:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:51,483 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2019-11-06 22:09:51,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:09:51,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2019-11-06 22:09:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:51,484 INFO L225 Difference]: With dead ends: 109 [2019-11-06 22:09:51,484 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:09:51,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:09:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:09:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 22:09:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 22:09:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 22:09:51,488 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 124 [2019-11-06 22:09:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:51,489 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 22:09:51,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:09:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 22:09:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 22:09:51,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:51,490 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:51,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:51,698 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash -820345923, now seen corresponding path program 17 times [2019-11-06 22:09:51,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:51,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339628486] [2019-11-06 22:09:51,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:09:51,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339628486] [2019-11-06 22:09:51,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764679523] [2019-11-06 22:09:51,856 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:53,226 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-06 22:09:53,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:53,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:09:53,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 450 proven. 49 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:09:53,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:53,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:09:53,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433542412] [2019-11-06 22:09:53,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:09:53,264 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:09:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:09:53,265 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 12 states. [2019-11-06 22:09:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:53,378 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2019-11-06 22:09:53,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:09:53,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2019-11-06 22:09:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:53,380 INFO L225 Difference]: With dead ends: 111 [2019-11-06 22:09:53,380 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:09:53,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:09:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:09:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 22:09:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 22:09:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 22:09:53,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 126 [2019-11-06 22:09:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:53,386 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 22:09:53,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:09:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 22:09:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:09:53,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:53,388 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:53,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:53,593 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash 457316027, now seen corresponding path program 18 times [2019-11-06 22:09:53,594 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:53,594 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785420765] [2019-11-06 22:09:53,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:09:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:09:53,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785420765] [2019-11-06 22:09:53,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679172] [2019-11-06 22:09:53,760 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:54,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 22:09:54,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:09:54,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 22:09:54,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:09:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 450 proven. 64 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:09:54,390 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:09:54,390 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:09:54,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400213708] [2019-11-06 22:09:54,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:09:54,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:09:54,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:09:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:54,393 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 13 states. [2019-11-06 22:09:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:09:54,477 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2019-11-06 22:09:54,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:09:54,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 128 [2019-11-06 22:09:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:09:54,481 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:09:54,481 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 22:09:54,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:09:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 22:09:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-06 22:09:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 22:09:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2019-11-06 22:09:54,489 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 128 [2019-11-06 22:09:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:09:54,490 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2019-11-06 22:09:54,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:09:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2019-11-06 22:09:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:09:54,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:09:54,491 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:09:54,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:09:54,696 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:09:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:09:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash -70196679, now seen corresponding path program 19 times [2019-11-06 22:09:54,696 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:09:54,696 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749394704] [2019-11-06 22:09:54,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:09:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat