/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/eca-rers2012/Problem14_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:57,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:57,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:57,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:57,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:57,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:57,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:57,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:57,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:57,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:57,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:57,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:57,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:57,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:57,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:57,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:57,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:57,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:57,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:57,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:57,180 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 19:14:57,194 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:57,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:57,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:57,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:57,196 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:57,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:57,197 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:57,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:57,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:57,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:57,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:57,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:57,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:57,198 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:57,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:57,199 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:57,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:57,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:57,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:57,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:57,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:57,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:57,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:57,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:57,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:57,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:57,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:57,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:57,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:57,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:57,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:57,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:57,510 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:57,510 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:57,511 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-11-06 19:14:57,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae0a3240/80a5d5630678412980991aac8f90c0e5/FLAGccf0664f7 [2019-11-06 19:14:58,149 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:58,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-11-06 19:14:58,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae0a3240/80a5d5630678412980991aac8f90c0e5/FLAGccf0664f7 [2019-11-06 19:14:58,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae0a3240/80a5d5630678412980991aac8f90c0e5 [2019-11-06 19:14:58,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:58,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:58,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:58,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:58,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:58,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:58" (1/1) ... [2019-11-06 19:14:58,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a02787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:58, skipping insertion in model container [2019-11-06 19:14:58,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:58" (1/1) ... [2019-11-06 19:14:58,425 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:58,470 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:59,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:59,028 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:59,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:59,190 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:59,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59 WrapperNode [2019-11-06 19:14:59,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:59,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:59,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:59,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:59,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:59,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:59,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:59,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:59,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (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 19:14:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:59,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:59,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:01,271 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:01,271 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:01,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:01 BoogieIcfgContainer [2019-11-06 19:15:01,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:01,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:01,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:01,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:01,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:58" (1/3) ... [2019-11-06 19:15:01,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3107e87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:01, skipping insertion in model container [2019-11-06 19:15:01,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (2/3) ... [2019-11-06 19:15:01,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3107e87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:01, skipping insertion in model container [2019-11-06 19:15:01,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:01" (3/3) ... [2019-11-06 19:15:01,287 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2019-11-06 19:15:01,301 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:01,314 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:01,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:01,373 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:01,373 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:01,373 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:01,373 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:01,375 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:01,376 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:01,376 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:01,376 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:15:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-06 19:15:01,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:01,419 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:01,420 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash 856083907, now seen corresponding path program 1 times [2019-11-06 19:15:01,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:01,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784371491] [2019-11-06 19:15:01,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:01,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784371491] [2019-11-06 19:15:01,693 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:01,694 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 19:15:01,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578342802] [2019-11-06 19:15:01,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 19:15:01,703 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 19:15:01,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 19:15:01,726 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-11-06 19:15:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:03,703 INFO L93 Difference]: Finished difference Result 714 states and 1256 transitions. [2019-11-06 19:15:03,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:15:03,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-06 19:15:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:03,721 INFO L225 Difference]: With dead ends: 714 [2019-11-06 19:15:03,721 INFO L226 Difference]: Without dead ends: 380 [2019-11-06 19:15:03,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-11-06 19:15:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 376. [2019-11-06 19:15:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-11-06 19:15:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-11-06 19:15:03,810 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 12 [2019-11-06 19:15:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:03,810 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-11-06 19:15:03,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 19:15:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-11-06 19:15:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 19:15:03,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:03,815 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:03,816 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1019209391, now seen corresponding path program 1 times [2019-11-06 19:15:03,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:03,817 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709277032] [2019-11-06 19:15:03,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:04,132 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709277032] [2019-11-06 19:15:04,133 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349758871] [2019-11-06 19:15:04,133 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 19:15:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:04,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:04,289 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:04,289 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:15:04,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784644738] [2019-11-06 19:15:04,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:04,296 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:04,297 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-11-06 19:15:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:05,123 INFO L93 Difference]: Finished difference Result 1114 states and 1580 transitions. [2019-11-06 19:15:05,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:05,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-11-06 19:15:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:05,130 INFO L225 Difference]: With dead ends: 1114 [2019-11-06 19:15:05,130 INFO L226 Difference]: Without dead ends: 744 [2019-11-06 19:15:05,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-11-06 19:15:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-11-06 19:15:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-11-06 19:15:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 975 transitions. [2019-11-06 19:15:05,178 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 975 transitions. Word has length 95 [2019-11-06 19:15:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:05,178 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 975 transitions. [2019-11-06 19:15:05,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 975 transitions. [2019-11-06 19:15:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 19:15:05,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:05,183 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:05,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:05,389 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:05,390 INFO L82 PathProgramCache]: Analyzing trace with hash -788431111, now seen corresponding path program 1 times [2019-11-06 19:15:05,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:05,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767244105] [2019-11-06 19:15:05,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:05,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767244105] [2019-11-06 19:15:05,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520749281] [2019-11-06 19:15:05,594 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 19:15:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:15:05,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:05,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:05,828 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:05,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:15:05,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289354296] [2019-11-06 19:15:05,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:05,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:05,830 INFO L87 Difference]: Start difference. First operand 744 states and 975 transitions. Second operand 5 states. [2019-11-06 19:15:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:07,156 INFO L93 Difference]: Finished difference Result 1874 states and 2429 transitions. [2019-11-06 19:15:07,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:07,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-11-06 19:15:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:07,164 INFO L225 Difference]: With dead ends: 1874 [2019-11-06 19:15:07,164 INFO L226 Difference]: Without dead ends: 1136 [2019-11-06 19:15:07,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:15:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2019-11-06 19:15:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1120. [2019-11-06 19:15:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2019-11-06 19:15:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1401 transitions. [2019-11-06 19:15:07,234 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1401 transitions. Word has length 107 [2019-11-06 19:15:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:07,235 INFO L462 AbstractCegarLoop]: Abstraction has 1120 states and 1401 transitions. [2019-11-06 19:15:07,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1401 transitions. [2019-11-06 19:15:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 19:15:07,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:07,239 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:07,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:07,451 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:07,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900547, now seen corresponding path program 1 times [2019-11-06 19:15:07,452 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:07,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895925839] [2019-11-06 19:15:07,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:07,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895925839] [2019-11-06 19:15:07,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715666109] [2019-11-06 19:15:07,616 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 19:15:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:07,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:07,733 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:07,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:15:07,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695324014] [2019-11-06 19:15:07,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:07,735 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:07,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:07,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:07,735 INFO L87 Difference]: Start difference. First operand 1120 states and 1401 transitions. Second operand 3 states. [2019-11-06 19:15:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:08,573 INFO L93 Difference]: Finished difference Result 1308 states and 1718 transitions. [2019-11-06 19:15:08,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:08,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-06 19:15:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:08,580 INFO L225 Difference]: With dead ends: 1308 [2019-11-06 19:15:08,580 INFO L226 Difference]: Without dead ends: 1306 [2019-11-06 19:15:08,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2019-11-06 19:15:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1306. [2019-11-06 19:15:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2019-11-06 19:15:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1716 transitions. [2019-11-06 19:15:08,651 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1716 transitions. Word has length 121 [2019-11-06 19:15:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:08,652 INFO L462 AbstractCegarLoop]: Abstraction has 1306 states and 1716 transitions. [2019-11-06 19:15:08,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1716 transitions. [2019-11-06 19:15:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-06 19:15:08,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:08,657 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:08,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:08,872 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:08,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1321617802, now seen corresponding path program 1 times [2019-11-06 19:15:08,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:08,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061733391] [2019-11-06 19:15:08,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:15:09,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061733391] [2019-11-06 19:15:09,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349767579] [2019-11-06 19:15:09,105 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 19:15:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:09,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 19:15:09,247 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:09,247 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-11-06 19:15:09,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403581744] [2019-11-06 19:15:09,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:09,249 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:15:09,249 INFO L87 Difference]: Start difference. First operand 1306 states and 1716 transitions. Second operand 5 states. [2019-11-06 19:15:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:10,549 INFO L93 Difference]: Finished difference Result 3210 states and 4493 transitions. [2019-11-06 19:15:10,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:10,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2019-11-06 19:15:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:10,566 INFO L225 Difference]: With dead ends: 3210 [2019-11-06 19:15:10,567 INFO L226 Difference]: Without dead ends: 1910 [2019-11-06 19:15:10,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:15:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2019-11-06 19:15:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1874. [2019-11-06 19:15:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2019-11-06 19:15:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2458 transitions. [2019-11-06 19:15:10,662 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2458 transitions. Word has length 177 [2019-11-06 19:15:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:10,667 INFO L462 AbstractCegarLoop]: Abstraction has 1874 states and 2458 transitions. [2019-11-06 19:15:10,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2458 transitions. [2019-11-06 19:15:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 19:15:10,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:10,671 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:10,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:10,878 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash 740914162, now seen corresponding path program 1 times [2019-11-06 19:15:10,879 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:10,879 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377256735] [2019-11-06 19:15:10,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:11,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377256735] [2019-11-06 19:15:11,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81883979] [2019-11-06 19:15:11,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:15:11,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:11,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:11,766 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:11,766 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-11-06 19:15:11,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854155535] [2019-11-06 19:15:11,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:15:11,767 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:15:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:15:11,768 INFO L87 Difference]: Start difference. First operand 1874 states and 2458 transitions. Second operand 16 states. [2019-11-06 19:15:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:15,466 INFO L93 Difference]: Finished difference Result 3876 states and 5103 transitions. [2019-11-06 19:15:15,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 19:15:15,466 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 191 [2019-11-06 19:15:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:15,476 INFO L225 Difference]: With dead ends: 3876 [2019-11-06 19:15:15,476 INFO L226 Difference]: Without dead ends: 1961 [2019-11-06 19:15:15,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-11-06 19:15:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2019-11-06 19:15:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1876. [2019-11-06 19:15:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2019-11-06 19:15:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2254 transitions. [2019-11-06 19:15:15,551 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2254 transitions. Word has length 191 [2019-11-06 19:15:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:15,552 INFO L462 AbstractCegarLoop]: Abstraction has 1876 states and 2254 transitions. [2019-11-06 19:15:15,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:15:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2254 transitions. [2019-11-06 19:15:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-06 19:15:15,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:15,555 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:15,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:15,762 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:15,763 INFO L82 PathProgramCache]: Analyzing trace with hash -284080629, now seen corresponding path program 1 times [2019-11-06 19:15:15,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:15,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015503303] [2019-11-06 19:15:15,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:15:15,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015503303] [2019-11-06 19:15:15,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448315604] [2019-11-06 19:15:15,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:16,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:15:16,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:16,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:15:16,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816395830] [2019-11-06 19:15:16,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:16,124 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:16,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:16,124 INFO L87 Difference]: Start difference. First operand 1876 states and 2254 transitions. Second operand 3 states. [2019-11-06 19:15:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:16,746 INFO L93 Difference]: Finished difference Result 4668 states and 5584 transitions. [2019-11-06 19:15:16,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:16,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2019-11-06 19:15:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:16,760 INFO L225 Difference]: With dead ends: 4668 [2019-11-06 19:15:16,760 INFO L226 Difference]: Without dead ends: 2614 [2019-11-06 19:15:16,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2019-11-06 19:15:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2060. [2019-11-06 19:15:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-11-06 19:15:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2436 transitions. [2019-11-06 19:15:16,831 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2436 transitions. Word has length 194 [2019-11-06 19:15:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:16,831 INFO L462 AbstractCegarLoop]: Abstraction has 2060 states and 2436 transitions. [2019-11-06 19:15:16,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2436 transitions. [2019-11-06 19:15:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-06 19:15:16,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:16,835 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:17,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:17,040 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2108772671, now seen corresponding path program 1 times [2019-11-06 19:15:17,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:17,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329015571] [2019-11-06 19:15:17,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:17,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329015571] [2019-11-06 19:15:17,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530743845] [2019-11-06 19:15:17,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:18,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:18,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:18,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:15:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 19:15:18,195 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:18,195 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2019-11-06 19:15:18,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499903896] [2019-11-06 19:15:18,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:18,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:15:18,197 INFO L87 Difference]: Start difference. First operand 2060 states and 2436 transitions. Second operand 5 states. [2019-11-06 19:15:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:19,323 INFO L93 Difference]: Finished difference Result 4326 states and 5285 transitions. [2019-11-06 19:15:19,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:19,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 216 [2019-11-06 19:15:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:19,334 INFO L225 Difference]: With dead ends: 4326 [2019-11-06 19:15:19,335 INFO L226 Difference]: Without dead ends: 2638 [2019-11-06 19:15:19,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-11-06 19:15:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2019-11-06 19:15:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2452. [2019-11-06 19:15:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2019-11-06 19:15:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 2908 transitions. [2019-11-06 19:15:19,399 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 2908 transitions. Word has length 216 [2019-11-06 19:15:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:19,399 INFO L462 AbstractCegarLoop]: Abstraction has 2452 states and 2908 transitions. [2019-11-06 19:15:19,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 2908 transitions. [2019-11-06 19:15:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-11-06 19:15:19,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:19,405 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:19,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:19,611 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:19,612 INFO L82 PathProgramCache]: Analyzing trace with hash 84824594, now seen corresponding path program 1 times [2019-11-06 19:15:19,612 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:19,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13729437] [2019-11-06 19:15:19,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 119 proven. 100 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-06 19:15:20,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13729437] [2019-11-06 19:15:20,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315584775] [2019-11-06 19:15:20,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:20,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:15:20,643 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:20,644 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-06 19:15:20,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442983159] [2019-11-06 19:15:20,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:15:20,645 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:15:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:15:20,646 INFO L87 Difference]: Start difference. First operand 2452 states and 2908 transitions. Second operand 13 states. [2019-11-06 19:15:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:25,006 INFO L93 Difference]: Finished difference Result 4742 states and 5734 transitions. [2019-11-06 19:15:25,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 19:15:25,007 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 326 [2019-11-06 19:15:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:25,016 INFO L225 Difference]: With dead ends: 4742 [2019-11-06 19:15:25,016 INFO L226 Difference]: Without dead ends: 2478 [2019-11-06 19:15:25,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 19:15:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-11-06 19:15:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2458. [2019-11-06 19:15:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2458 states. [2019-11-06 19:15:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 2826 transitions. [2019-11-06 19:15:25,076 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 2826 transitions. Word has length 326 [2019-11-06 19:15:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:25,076 INFO L462 AbstractCegarLoop]: Abstraction has 2458 states and 2826 transitions. [2019-11-06 19:15:25,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:15:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 2826 transitions. [2019-11-06 19:15:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-11-06 19:15:25,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:25,084 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:25,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:25,288 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1745249514, now seen corresponding path program 1 times [2019-11-06 19:15:25,289 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:25,289 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280066664] [2019-11-06 19:15:25,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-11-06 19:15:25,627 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280066664] [2019-11-06 19:15:25,627 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213956769] [2019-11-06 19:15:25,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:25,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:15:25,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:25,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:15:25,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969650191] [2019-11-06 19:15:25,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:25,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:25,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:25,984 INFO L87 Difference]: Start difference. First operand 2458 states and 2826 transitions. Second operand 3 states. [2019-11-06 19:15:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:26,615 INFO L93 Difference]: Finished difference Result 3188 states and 3662 transitions. [2019-11-06 19:15:26,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:26,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 404 [2019-11-06 19:15:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:26,628 INFO L225 Difference]: With dead ends: 3188 [2019-11-06 19:15:26,628 INFO L226 Difference]: Without dead ends: 3186 [2019-11-06 19:15:26,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2019-11-06 19:15:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2640. [2019-11-06 19:15:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2640 states. [2019-11-06 19:15:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3032 transitions. [2019-11-06 19:15:26,685 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3032 transitions. Word has length 404 [2019-11-06 19:15:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:26,686 INFO L462 AbstractCegarLoop]: Abstraction has 2640 states and 3032 transitions. [2019-11-06 19:15:26,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3032 transitions. [2019-11-06 19:15:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2019-11-06 19:15:26,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:26,694 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:26,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:26,898 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:26,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1452112011, now seen corresponding path program 1 times [2019-11-06 19:15:26,899 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:26,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099002085] [2019-11-06 19:15:26,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 297 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-11-06 19:15:27,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099002085] [2019-11-06 19:15:27,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711324132] [2019-11-06 19:15:27,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:15:27,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:27,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-11-06 19:15:28,366 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:28,367 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:15:28,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141860210] [2019-11-06 19:15:28,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:15:28,368 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:28,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:15:28,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:15:28,369 INFO L87 Difference]: Start difference. First operand 2640 states and 3032 transitions. Second operand 12 states. [2019-11-06 19:15:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:30,508 INFO L93 Difference]: Finished difference Result 5171 states and 5994 transitions. [2019-11-06 19:15:30,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:15:30,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 410 [2019-11-06 19:15:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:30,518 INFO L225 Difference]: With dead ends: 5171 [2019-11-06 19:15:30,519 INFO L226 Difference]: Without dead ends: 2862 [2019-11-06 19:15:30,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:15:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2019-11-06 19:15:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2638. [2019-11-06 19:15:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2019-11-06 19:15:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 2927 transitions. [2019-11-06 19:15:30,579 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 2927 transitions. Word has length 410 [2019-11-06 19:15:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:30,579 INFO L462 AbstractCegarLoop]: Abstraction has 2638 states and 2927 transitions. [2019-11-06 19:15:30,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:15:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 2927 transitions. [2019-11-06 19:15:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2019-11-06 19:15:30,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:30,591 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:30,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:30,796 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1127836591, now seen corresponding path program 1 times [2019-11-06 19:15:30,797 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:30,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067677048] [2019-11-06 19:15:30,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 389 proven. 8 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-06 19:15:32,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067677048] [2019-11-06 19:15:32,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405368694] [2019-11-06 19:15:32,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:32,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:32,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:32,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms